[PATCH] Fix -Wimplicit-fallthrough ICE (PR c/77946)

[Marek Polacek]

On Thu, Oct 13, 2016 at 01:25:22AM +0200, Jakub Jelinek wrote:
> Hi!
> 
> Seems 2 functions in varasm.c just use TREE_PUBLIC on LABEL_DECLs together
> with other kinds of decls, but as TREE_PUBLIC on LABEL_DECLs means now
> something different, it breaks badly.
> While I could change those 2 functions in varasm.c, I'm afraid other
> functions might be doing something similar, so I think TREE_PRIVATE which is
> used far less often is a better choice for the flag bit here.
> 
> Bootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk?
 
Given this is a part of fallthru machinery: LGTM, but can't really approve.

	Marek