[PCH] Fix assertion hit related to enum decls inside templated funtions.

Report and suggested fix by Tom Honermann!
http://llvm.org/bugs/show_bug.cgi?id=13020

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@177330 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed