Convert another use of sys::identifyFileType.

No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183746 91177308-0d34-0410-b5e6-96231b3b80d8
Convert another use of sys::identifyFileType.

No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183747 91177308-0d34-0410-b5e6-96231b3b80d8
Fix variable name style. Don't cast to and from int.

This enables the compiler to see the enum and produce warnings about a switch
not being fully covered. Fix one of these warnings.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183749 91177308-0d34-0410-b5e6-96231b3b80d8