Fix typo correction crash on overloaded functions, pr10283.

It would be cool if we could do overload resolution to suggest
the right function, but at least this fixes the crashing.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@134976 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed