Reenable deprecation warnings, but force them to be treated as warnings

The /sdl flag forced C4996 to be treated as an error. I've set /w34996 to force it to be treated as a warning globally, and removed old pragmas that disabled it entirely.

OptiScaler/OptiScaler.vcxproj

@@ -195,6 +195,7 @@
       <LanguageStandard>stdcpplatest</LanguageStandard>
       <PrecompiledHeader>Use</PrecompiledHeader>
       <PrecompiledHeaderOutputFile>$(IntDir)$(TargetName).pch</PrecompiledHeaderOutputFile>
+      <AdditionalOptions>/w34996 %(AdditionalOptions)</AdditionalOptions>
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>
@@ -229,6 +230,7 @@
       <LanguageStandard>stdcpplatest</LanguageStandard>
       <PrecompiledHeader>Use</PrecompiledHeader>
       <FavorSizeOrSpeed>Speed</FavorSizeOrSpeed>
+      <AdditionalOptions>/w34996 %(AdditionalOptions)</AdditionalOptions>
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>
@@ -275,6 +277,7 @@ powershell -Command "Start-Sleep -Seconds 2; $commit = git rev-parse --short HEA
       <PrecompiledHeader>Use</PrecompiledHeader>
       <FavorSizeOrSpeed>Speed</FavorSizeOrSpeed>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
+      <AdditionalOptions>/w34996 %(AdditionalOptions)</AdditionalOptions>
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>

OptiScaler/SysUtils.h

@@ -1,5 +1,5 @@
 #pragma once
-#pragma warning(disable : 4996)
+
 
 #define WIN32_LEAN_AND_MEAN
 #define NOMINMAX

OptiScaler/dllmain.cpp

@@ -46,7 +46,7 @@
 static std::vector<HMODULE> _asiHandles;
 static bool _passThruMode = false;
 
-#pragma warning(disable : 4996)
+
 
 typedef const char*(CDECL* PFN_wine_get_version)(void);
 typedef void (*PFN_InitializeASI)(void);