[c Sema]. Patch fixes pointer-bool-conversion warning on C code
when source range is incorrect causing the warning to be
issued when it should not because expression is in a macro.
rdar://19256338


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@224549 91177308-0d34-0410-b5e6-96231b3b80d8