Silence Warning. NFC.
Silence Warning. NFC.

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@283583 91177308-0d34-0410-b5e6-96231b3b80d8
(cherry picked from commit 9ccc2ea6b64ec9a19102ba904a312e56faacb9d6)

apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang