Merge pull request #632 from steve-lunarg/structure-splitting

HLSL: inter-stage structure splitting.

hlsl/hlslGrammar.cpp

@@ -478,7 +478,7 @@ bool HlslGrammar::acceptFullySpecifiedType(TType& type)
     // type_specifier
     if (! acceptType(type)) {
         // If this is not a type, we may have inadvertently gone down a wrong path
-        // py parsing "sample", which can be treated like either an identifier or a
+        // by parsing "sample", which can be treated like either an identifier or a
         // qualifier.  Back it out, if we did.
         if (qualifier.sample)
             recedeToken();