Clean up the bool conversion warning. Group it with other conversion
warnings, and make its text appropriate for constant bool expressions
other than 'false'. This should finish off PR9612.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@129205 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed