Reversing the logic since C99 mode is actually not an extension.  Also, changing the group to the singular to match the diagnostic better.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@162838 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/DeclSpec.cpp b/lib/Sema/DeclSpec.cpp
index e8ce9ac..8fdb070 100644
--- a/lib/Sema/DeclSpec.cpp
+++ b/lib/Sema/DeclSpec.cpp
@@ -681,9 +681,9 @@
   // not what the user intended, we will always warn.  We do not need to set the
   // qualifier's location since we already have it.
   if (TypeQualifiers & T) {
-    bool IsExtension = false;
+    bool IsExtension = true;
     if (Lang.C99 || (Lang.CPlusPlus0x && !IsTypeSpec))
-      IsExtension = true;
+      IsExtension = false;
     return BadSpecifier(T, T, PrevSpec, DiagID, IsExtension);
   }
   TypeQualifiers |= T;