Fix pedantic narrowing conversion error.

Clang treats conversion of an unsigned constant to a signed one that
doesn't fit its range as an error. Make Visual Studio also produce an
error.

Change-Id: I2d392d5ba7765b72aa9e9478c5eee02102bdf286
Reviewed-on: https://swiftshader-review.googlesource.com/19648
Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
diff --git a/src/OpenGL/libGLESv2/libGLESv2.vcxproj b/src/OpenGL/libGLESv2/libGLESv2.vcxproj
index e932abc..80766fd 100644
--- a/src/OpenGL/libGLESv2/libGLESv2.vcxproj
+++ b/src/OpenGL/libGLESv2/libGLESv2.vcxproj
@@ -138,7 +138,7 @@
       <TreatWarningAsError>true</TreatWarningAsError>

       <DisableSpecificWarnings>5030;%(DisableSpecificWarnings)</DisableSpecificWarnings>

       <MultiProcessorCompilation>true</MultiProcessorCompilation>

-      <TreatSpecificWarningsAsErrors>4018;5038</TreatSpecificWarningsAsErrors>

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

     </ClCompile>

     <Link>

       <AdditionalDependencies>dxguid.lib;WS2_32.lib;%(AdditionalDependencies)</AdditionalDependencies>

@@ -169,7 +169,7 @@
       <TreatWarningAsError>true</TreatWarningAsError>

       <DisableSpecificWarnings>5030;%(DisableSpecificWarnings)</DisableSpecificWarnings>

       <MultiProcessorCompilation>true</MultiProcessorCompilation>

-      <TreatSpecificWarningsAsErrors>4018;5038</TreatSpecificWarningsAsErrors>

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

     </ClCompile>

     <Link>

       <AdditionalDependencies>dxguid.lib;WS2_32.lib;%(AdditionalDependencies)</AdditionalDependencies>

@@ -207,7 +207,7 @@
       <TreatWarningAsError>true</TreatWarningAsError>

       <DisableSpecificWarnings>5030;%(DisableSpecificWarnings)</DisableSpecificWarnings>

       <MultiProcessorCompilation>true</MultiProcessorCompilation>

-      <TreatSpecificWarningsAsErrors>4018;5038</TreatSpecificWarningsAsErrors>

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

     </ClCompile>

     <Link>

       <AdditionalDependencies>dxguid.lib;WS2_32.lib;%(AdditionalDependencies)</AdditionalDependencies>

@@ -246,7 +246,7 @@
       <TreatWarningAsError>true</TreatWarningAsError>

       <DisableSpecificWarnings>5030;%(DisableSpecificWarnings)</DisableSpecificWarnings>

       <MultiProcessorCompilation>true</MultiProcessorCompilation>

-      <TreatSpecificWarningsAsErrors>4018;5038</TreatSpecificWarningsAsErrors>

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

     </ClCompile>

     <Link>

       <AdditionalDependencies>dxguid.lib;WS2_32.lib;%(AdditionalDependencies)</AdditionalDependencies>

@@ -285,7 +285,7 @@
       <IntrinsicFunctions>false</IntrinsicFunctions>

       <TreatWarningAsError>true</TreatWarningAsError>

       <DisableSpecificWarnings>5030;%(DisableSpecificWarnings)</DisableSpecificWarnings>

-      <TreatSpecificWarningsAsErrors>4018;5038</TreatSpecificWarningsAsErrors>

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

     </ClCompile>

     <Link>

       <AdditionalDependencies>dxguid.lib;WS2_32.lib;%(AdditionalDependencies)</AdditionalDependencies>

@@ -322,7 +322,7 @@
       <IntrinsicFunctions>false</IntrinsicFunctions>

       <TreatWarningAsError>true</TreatWarningAsError>

       <DisableSpecificWarnings>5030;%(DisableSpecificWarnings)</DisableSpecificWarnings>

-      <TreatSpecificWarningsAsErrors>4018;5038</TreatSpecificWarningsAsErrors>

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

     </ClCompile>

     <Link>

       <AdditionalDependencies>dxguid.lib;WS2_32.lib;%(AdditionalDependencies)</AdditionalDependencies>