Build: Fix three new warnings in HLSL code.

hlsl/hlslGrammar.cpp

@@ -211,7 +211,7 @@ bool HlslGrammar::acceptSamplerState()
 // sampler_declaration_dx9
 //    : SAMPLER identifier EQUAL sampler_type sampler_state
 //
-bool HlslGrammar::acceptSamplerDeclarationDX9(TType& type)
+bool HlslGrammar::acceptSamplerDeclarationDX9(TType& /*type*/)
 {
     if (! acceptTokenClass(EHTokSampler))
         return false;

hlsl/hlslParseHelper.cpp

@@ -906,7 +906,7 @@ void HlslParseContext::decomposeSampleMethods(const TSourceLoc& loc, TIntermType
 
             TOperator textureOp = EOpTexture;
 
-            if (argAggregate->getSequence().size() == (nextArg+1)) { // last parameter is offset form
+            if ((int)argAggregate->getSequence().size() == (nextArg+1)) { // last parameter is offset form
                 textureOp = EOpTextureOffset;
                 argOffset = argAggregate->getSequence()[nextArg++]->getAsTyped();
             }

hlsl/hlslParseables.cpp

@@ -69,7 +69,7 @@ const char* BaseTypeName(const char argOrder, const char* scalarName, const char
 
 bool IsTextureType(const char argOrder)    { return argOrder == '%' || argOrder == '@'; }
 bool IsTextureArrayed(const char argOrder) { return argOrder == '@'; }
-bool IsTextureMS(const char argOrder)      { return false; } // TODO: ...
+bool IsTextureMS(const char /*argOrder*/)      { return false; } // TODO: ...
 
 // Reject certain combinations that are illegal sample methods.  For example,
 // 3D arrays.
@@ -118,7 +118,7 @@ glslang::TString& AppendTypeName(glslang::TString& s, const char* argOrder, cons
     const bool isMatMul    = (argOrder[0] == '#');
     const bool isTexture   = IsTextureType(argOrder[0]);
     const bool isArrayed   = IsTextureArrayed(argOrder[0]);
-    const bool isMS        = IsTextureMS(argOrder[0]);
+    //const bool isMS        = IsTextureMS(argOrder[0]);
 
     char order = *argOrder;
     char type  = *argType;