Workaround for PR3173.  The fix is correct in the sense that if the enum 
code were working correctly, it would be a no-op, but it's not really a 
proper fix.  That said, I don't really want to touch the enum code at 
the moment because I don't understand it very well, and this seems to 
be a relatively visible regression.

llvm-svn: 60680
diff --git a/clang/test/Sema/enum.c b/clang/test/Sema/enum.c
index b06882b..5782a43 100644
--- a/clang/test/Sema/enum.c
+++ b/clang/test/Sema/enum.c
@@ -55,3 +55,6 @@
 enum e0 { // expected-note {{previous definition is here}}
   E0 = sizeof(enum e0 { E1 }) // expected-error {{nested redefinition}}
 };
+
+// PR3173
+enum { PR3173A, PR3173B = PR3173A+50 };