HLSL: Change the final syntax-error printf to go to the infoLog.

Fixes issue #510.

glslang/Include/revision.h

@@ -2,5 +2,5 @@
 // For the version, it uses the latest git tag followed by the number of commits.
 // For the date, it uses the current date (when then script is run).
 
-#define GLSLANG_REVISION "Overload400-PrecQual.1494"
+#define GLSLANG_REVISION "Overload400-PrecQual.1495"
 #define GLSLANG_DATE "19-Sep-2016"

glslang/MachineIndependent/InfoSink.cpp

@@ -41,9 +41,13 @@ namespace glslang {
 void TInfoSinkBase::append(const char* s)
 {
     if (outputStream & EString) {
+        if (s == nullptr)
+            sink.append("(null)");
+        else {
             checkMem(strlen(s));
             sink.append(s);
         }
+    }
 
 //#ifdef _WIN32
 //    if (outputStream & EDebugger)

hlsl/hlslParseHelper.cpp

@@ -124,8 +124,8 @@ bool HlslParseContext::parseShaderStrings(TPpContext& ppContext, TInputScanner&
         // Print a message formated such that if you click on the message it will take you right to
         // the line through most UIs.
         const glslang::TSourceLoc& sourceLoc = input.getSourceLoc();
-        printf("\n%s(%i): error at column %i, HLSL translation failed.\n", sourceLoc.name, sourceLoc.line,
-                                                                                           sourceLoc.column);
+        infoSink.info << sourceLoc.name << "(" << sourceLoc.line << "): error at column " << sourceLoc.column << ", HLSL parsing failed.\n";
+        ++numErrors;
         return false;
     }