A more minimal fix for PR6762.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@104991 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/Sema.h b/lib/Sema/Sema.h
index 24961c7..0870cf4 100644
--- a/lib/Sema/Sema.h
+++ b/lib/Sema/Sema.h
@@ -239,6 +239,10 @@
   /// CurContext - This is the current declaration context of parsing.
   DeclContext *CurContext;
 
+  /// VAListTagName - The declaration name corresponding to __va_list_tag.
+  /// This is used as part of a hack to omit that class from ADL results.
+  DeclarationName VAListTagName;
+
   /// A RAII object to temporarily push a declaration context.
   class ContextRAII {
   private: