Simplify condition. (NFC)
Simplify condition. (NFC)

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@278946 91177308-0d34-0410-b5e6-96231b3b80d8
(cherry picked from commit 0c4be46253825314223aee85bd404b7157d09ffa)

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