Feel free to commit such trivial fixes without reviews. Alternatively, you could use LLVM_FALLTHROUGH, but I have no strong preference in this case.
Was already done: https://github.com/llvm-mirror/clang/commit/bacdda22396c39181aa0e641182e01a0b3cf43ea
@xazax.hun Yes, I planned to just commit. Set you as Subscriber not Reviewer in Arc. Was just a bit confused why it fails at first :)