clang-format: Fix regression introduced by r190038.

Before:
  Constructor()
      : aaaaaaaaaaaaaaaaaaaa(a), bbbbbbbbbbbbbbbbbbbbbbbb(b) {
                                 }
After:
  Constructor()
      : aaaaaaaaaaaaaaaaaaaa(a), bbbbbbbbbbbbbbbbbbbbbbbb(b) {
  }

llvm-svn: 190209