Make -mms-bitfields behave consistently.

Patch by Jeremiah Zanin.

llvm-svn: 165849
diff --git a/clang/lib/CodeGen/CGDebugInfo.cpp b/clang/lib/CodeGen/CGDebugInfo.cpp
index e263a44..402a945 100644
--- a/clang/lib/CodeGen/CGDebugInfo.cpp
+++ b/clang/lib/CodeGen/CGDebugInfo.cpp
@@ -824,7 +824,7 @@
       }
     }
   } else {
-    bool IsMsStruct = record->hasAttr<MsStructAttr>();
+    bool IsMsStruct = record->isMsStruct(CGM.getContext());
     const FieldDecl *LastFD = 0;
     for (RecordDecl::field_iterator I = record->field_begin(),
            E = record->field_end();