Try to fix MSVC build

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212888 91177308-0d34-0410-b5e6-96231b3b80d8
Try to fix MSVC warning.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212889 91177308-0d34-0410-b5e6-96231b3b80d8