Fix mkvisitor.

Keep mkvisitor up to date with the current changes in the
Qt Creator repository.

Change-Id: I1e6770fb676f38a7d7aa5a2b4f1e38a2425cd686
Reviewed-by: Leandro Melo <leandro.melo@nokia.com>

src/tools/mkvisitor/main.cpp

@@ -442,7 +442,7 @@ int main(int argc, char *argv[])
 
         Document::Ptr doc = Document::create(fileName);
         //doc->control()->setDiagnosticClient(0);
-        doc->setSource(source);
+        doc->setUtf8Source(source);
         doc->parse();
 
         doc->translationUnit()->blockErrors(true);