[PATCH] Ignore warning in string/tester.c.

[Ondřej Bílka]

On Mon, Dec 15, 2014 at 08:15:47PM +0100, Torvald Riegel wrote:
> This fixes a warning in a build using a fairly recent GCC.  AFAIK the
> warning/option is new and hasn't been offered by 4.9, hence the
> conditional.  OK?

OK with obvious ChangeLog.