Further change in a comment.

llvm-svn: 86599
diff --git a/clang/lib/Sema/Sema.h b/clang/lib/Sema/Sema.h
index bf2079a..b9e8473 100644
--- a/clang/lib/Sema/Sema.h
+++ b/clang/lib/Sema/Sema.h
@@ -3483,7 +3483,8 @@
     
     /// IncompatibleNestedPointerQualifiers - The assignment is between two
     /// nested pointer types, and the qualifiers other than the first two
-    /// levels differ e.g. char ** -> const char **. We disallow this.
+    /// levels differ e.g. char ** -> const char **, but we accept them as an 
+    /// extension. 
     IncompatibleNestedPointerQualifiers,
 
     /// IncompatibleVectors - The assignment is between two vector types that