Fixed bug in return type of __builtin_va_start().

llvm-svn: 194197
diff --git a/clang/lib/Sema/SemaChecking.cpp b/clang/lib/Sema/SemaChecking.cpp
index b1da24b..5fe2d03 100644
--- a/clang/lib/Sema/SemaChecking.cpp
+++ b/clang/lib/Sema/SemaChecking.cpp
@@ -1651,6 +1651,7 @@
     Diag(ParamLoc, diag::note_parameter_type) << Type;
   }
 
+  TheCall->setType(Context.VoidTy);
   return false;
 }