Fix <rdar://problem/6248764> parser rejects: bad receiver type 'CFStringRef'.

Downgrade an error to a warning (for GCC compatibility).


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65779 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed