Fix Visual Studio solution build

Suppress the "conversion from 'size_t' to 'type', possible loss of data"
warning which gets treated as an error, to match the CMake build for
MSVC, and other compilers.

Bug: swiftshader:131
Change-Id: I2fb6695e5ed541b052e170b577fcaafb6ba169c4
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/34268
Presubmit-Ready: Nicolas Capens <nicolascapens@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
diff --git a/src/Vulkan/vulkan.vcxproj b/src/Vulkan/vulkan.vcxproj
index 9da32ff..e6c5020 100644
--- a/src/Vulkan/vulkan.vcxproj
+++ b/src/Vulkan/vulkan.vcxproj
@@ -67,6 +67,7 @@
       <AdditionalOptions>/permissive- %(AdditionalOptions)</AdditionalOptions>

       <TreatSpecificWarningsAsErrors>4018;5038;4838</TreatSpecificWarningsAsErrors>

       <MultiProcessorCompilation>true</MultiProcessorCompilation>

+      <DisableSpecificWarnings>4267</DisableSpecificWarnings>

     </ClCompile>

     <Link>

       <EnableCOMDATFolding>true</EnableCOMDATFolding>

@@ -93,6 +94,7 @@
       <AdditionalOptions>/permissive- %(AdditionalOptions)</AdditionalOptions>

       <TreatSpecificWarningsAsErrors>4018;5038;4838</TreatSpecificWarningsAsErrors>

       <MultiProcessorCompilation>true</MultiProcessorCompilation>

+      <DisableSpecificWarnings>4267</DisableSpecificWarnings>

     </ClCompile>

     <Link>

       <ModuleDefinitionFile>libvk_swiftshader.def</ModuleDefinitionFile>

@@ -303,4 +305,4 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />

   <ImportGroup Label="ExtensionTargets">

   </ImportGroup>

-</Project>

+</Project>
\ No newline at end of file