Fix a small bug where DiagnoseEmptyLookup would no longer print any messages
when performing typo correction involving any overloaded template functions.

The added test cases, while currently demontrating sub-optimal behavior, will
not trigger any messages without the 1-line change to SemaExpr.cpp.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@136943 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed