Ignore Visual Studio 2019's arithmetic overflow warning.
Ignore Visual Studio 2019's arithmetic overflow warning.

It is obnoxious and only in the IDE and not at compile-time.

--- a/src/in_2sf/in_2sf.vcxproj
+++ b/src/in_2sf/in_2sf.vcxproj
@@ -52,7 +52,7 @@
       <Optimization>Disabled</Optimization>
       <PreprocessorDefinitions>WIN32;_WINDOWS;_USRDLL;IN_2SF_EXPORTS;_CRT_SECURE_NO_WARNINGS;WINAMP_PLUGIN;HAVE_LIBZ;_DEBUG;_ITERATOR_DEBUG_LEVEL=0;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <AdditionalIncludeDirectories>..\in_xsf_framework;..\in_xsf_framework\zlib;..\in_xsf_framework\winamp;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <DisableSpecificWarnings>4065;4100;4127;4146;4189;4201;4244;4245;4512;4706;4996;%(DisableSpecificWarnings)</DisableSpecificWarnings>
+      <DisableSpecificWarnings>4065;4100;4127;4146;4189;4201;4244;4245;4512;4706;4996;26451;%(DisableSpecificWarnings)</DisableSpecificWarnings>
       <LanguageStandard>stdcpp17</LanguageStandard>
     </ClCompile>
     <Link>
@@ -68,7 +68,7 @@
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <PreprocessorDefinitions>WIN32;_WINDOWS;_USRDLL;IN_2SF_EXPORTS;_CRT_SECURE_NO_WARNINGS;WINAMP_PLUGIN;HAVE_LIBZ;NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <AdditionalIncludeDirectories>..\in_xsf_framework;..\in_xsf_framework\zlib;..\in_xsf_framework\winamp;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <DisableSpecificWarnings>4065;4100;4127;4146;4189;4201;4244;4245;4512;4706;4996;%(DisableSpecificWarnings)</DisableSpecificWarnings>
+      <DisableSpecificWarnings>4065;4100;4127;4146;4189;4201;4244;4245;4512;4706;4996;26451;%(DisableSpecificWarnings)</DisableSpecificWarnings>
       <LanguageStandard>stdcpp17</LanguageStandard>
     </ClCompile>
     <Link>

--- a/src/in_gsf/in_gsf.vcxproj
+++ b/src/in_gsf/in_gsf.vcxproj
@@ -52,7 +52,7 @@
       <Optimization>Disabled</Optimization>
       <PreprocessorDefinitions>WIN32;_WINDOWS;_USRDLL;IN_GSF_EXPORTS;_CRT_SECURE_NO_WARNINGS;WINAMP_PLUGIN;_DEBUG;_ITERATOR_DEBUG_LEVEL=0;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <AdditionalIncludeDirectories>..\in_xsf_framework;..\in_xsf_framework\zlib;..\in_xsf_framework\winamp;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <DisableSpecificWarnings>4100;4127;4189;4244;4291;4310;4512;4800;%(DisableSpecificWarnings)</DisableSpecificWarnings>
+      <DisableSpecificWarnings>4100;4127;4189;4244;4291;4310;4512;4800;26451;%(DisableSpecificWarnings)</DisableSpecificWarnings>
       <LanguageStandard>stdcpp17</LanguageStandard>
     </ClCompile>
     <Link>
@@ -68,7 +68,7 @@
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <PreprocessorDefinitions>WIN32;_WINDOWS;_USRDLL;IN_GSF_EXPORTS;_CRT_SECURE_NO_WARNINGS;WINAMP_PLUGIN;NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <AdditionalIncludeDirectories>..\in_xsf_framework;..\in_xsf_framework\zlib;..\in_xsf_framework\winamp;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <DisableSpecificWarnings>4100;4127;4189;4244;4291;4310;4512;4800;%(DisableSpecificWarnings)</DisableSpecificWarnings>
+      <DisableSpecificWarnings>4100;4127;4189;4244;4291;4310;4512;4800;26451;%(DisableSpecificWarnings)</DisableSpecificWarnings>
       <LanguageStandard>stdcpp17</LanguageStandard>
     </ClCompile>
     <Link>

--- a/src/in_ncsf/in_ncsf.vcxproj
+++ b/src/in_ncsf/in_ncsf.vcxproj
@@ -52,7 +52,7 @@
       <Optimization>Disabled</Optimization>
       <PreprocessorDefinitions>WIN32;_WINDOWS;_USRDLL;IN_NCSF_EXPORTS;_CRT_SECURE_NO_WARNINGS;WINAMP_PLUGIN;_DEBUG;_ITERATOR_DEBUG_LEVEL=0;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <AdditionalIncludeDirectories>..\in_xsf_framework;..\in_xsf_framework\zlib;..\in_xsf_framework\winamp;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <DisableSpecificWarnings>4244;%(DisableSpecificWarnings)</DisableSpecificWarnings>
+      <DisableSpecificWarnings>4244;26451;%(DisableSpecificWarnings)</DisableSpecificWarnings>
       <LanguageStandard>stdcpp17</LanguageStandard>
     </ClCompile>
     <Link>
@@ -68,7 +68,7 @@
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <PreprocessorDefinitions>WIN32;_WINDOWS;_USRDLL;IN_NCSF_EXPORTS;_CRT_SECURE_NO_WARNINGS;WINAMP_PLUGIN;NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <AdditionalIncludeDirectories>..\in_xsf_framework;..\in_xsf_framework\zlib;..\in_xsf_framework\winamp;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <DisableSpecificWarnings>4244;%(DisableSpecificWarnings)</DisableSpecificWarnings>
+      <DisableSpecificWarnings>4244;26451;%(DisableSpecificWarnings)</DisableSpecificWarnings>
       <LanguageStandard>stdcpp17</LanguageStandard>
     </ClCompile>
     <Link>

--- a/src/in_snsf/in_snsf.vcxproj
+++ b/src/in_snsf/in_snsf.vcxproj
@@ -52,7 +52,7 @@
       <Optimization>Disabled</Optimization>
       <PreprocessorDefinitions>WIN32;_WINDOWS;_USRDLL;IN_SNSF_EXPORTS;_CRT_SECURE_NO_WARNINGS;WINAMP_PLUGIN;_DEBUG;_ITERATOR_DEBUG_LEVEL=0;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <AdditionalIncludeDirectories>..\in_xsf_framework;..\in_xsf_framework\zlib;..\in_xsf_framework\winamp;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <DisableSpecificWarnings>4100;4127;4244;4245;4310;%(DisableSpecificWarnings)</DisableSpecificWarnings>
+      <DisableSpecificWarnings>4100;4127;4244;4245;4310;26451;%(DisableSpecificWarnings)</DisableSpecificWarnings>
       <LanguageStandard>stdcpp17</LanguageStandard>
     </ClCompile>
     <Link>
@@ -68,7 +68,7 @@
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <PreprocessorDefinitions>WIN32;_WINDOWS;_USRDLL;IN_SNSF_EXPORTS;_CRT_SECURE_NO_WARNINGS;WINAMP_PLUGIN;NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <AdditionalIncludeDirectories>..\in_xsf_framework;..\in_xsf_framework\zlib;..\in_xsf_framework\winamp;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <DisableSpecificWarnings>4100;4127;4244;4245;4310;%(DisableSpecificWarnings)</DisableSpecificWarnings>
+      <DisableSpecificWarnings>4100;4127;4244;4245;4310;26451;%(DisableSpecificWarnings)</DisableSpecificWarnings>
       <LanguageStandard>stdcpp17</LanguageStandard>
     </ClCompile>
     <Link>

--- a/src/in_xsf_framework/in_xsf_framework.vcxproj
+++ b/src/in_xsf_framework/in_xsf_framework.vcxproj
@@ -47,7 +47,7 @@
       <Optimization>Disabled</Optimization>
       <PreprocessorDefinitions>WIN32;_LIB;_CRT_SECURE_NO_WARNINGS;WINAMP_PLUGIN;UNICODE_INPUT_PLUGIN;_DEBUG;_ITERATOR_DEBUG_LEVEL=0;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <AdditionalIncludeDirectories>.\zlib;.\winamp;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <DisableSpecificWarnings>4127;4244;4512;%(DisableSpecificWarnings)</DisableSpecificWarnings>
+      <DisableSpecificWarnings>4127;4244;4512;26451;%(DisableSpecificWarnings)</DisableSpecificWarnings>
       <LanguageStandard>stdcpp17</LanguageStandard>
     </ClCompile>
     <Link>
@@ -63,7 +63,7 @@
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <PreprocessorDefinitions>WIN32;_LIB;_CRT_SECURE_NO_WARNINGS;WINAMP_PLUGIN;UNICODE_INPUT_PLUGIN;NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <AdditionalIncludeDirectories>.\zlib;.\winamp;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <DisableSpecificWarnings>4127;4244;4512;%(DisableSpecificWarnings)</DisableSpecificWarnings>
+      <DisableSpecificWarnings>4127;4244;4512;26451;%(DisableSpecificWarnings)</DisableSpecificWarnings>
       <LanguageStandard>stdcpp17</LanguageStandard>
     </ClCompile>
     <Link>