FixIt insert 'static' for anonymous unions at global or namespace scope.

llvm-svn: 142566
diff --git a/clang/lib/Sema/SemaDecl.cpp b/clang/lib/Sema/SemaDecl.cpp
index 8d97850..bccb63e 100644
--- a/clang/lib/Sema/SemaDecl.cpp
+++ b/clang/lib/Sema/SemaDecl.cpp
@@ -2653,7 +2653,8 @@
           (isa<TranslationUnitDecl>(Owner) ||
            (isa<NamespaceDecl>(Owner) &&
             cast<NamespaceDecl>(Owner)->getDeclName()))) {
-        Diag(Record->getLocation(), diag::err_anonymous_union_not_static);
+        Diag(Record->getLocation(), diag::err_anonymous_union_not_static)
+          << FixItHint::CreateInsertion(Record->getLocation(), "static ");
         Invalid = true;
   
         // Recover by adding 'static'.