Memory/constructor/warning clean-up. Addresses issue #705.

hlsl/hlslGrammar.cpp

@@ -2319,6 +2319,8 @@ bool HlslGrammar::acceptPostfixExpression(TIntermTyped*& node)
         tFinalize(HlslParseContext& p) : parseContext(p) { }
         ~tFinalize() { parseContext.finalizeFlattening(); }
        HlslParseContext& parseContext;
+    private:
+        tFinalize& operator=(tFinalize&) { }
     } finalize(parseContext);
 
     // Initialize the flattening accumulation data, so we can track data across multiple bracket or