One can have an unavailable method overridden by an available method,
but not vice-versa. Fix bug introduced in r172567 and noticed by
Jordan, thanks!


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172586 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed