bug#21337: 25.0.50; inotify error message

[Eli Zaretskii <eliz@gnu.org>]

> Date: Fri, 28 Aug 2015 16:30:16 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: 21337@debbugs.gnu.org
> 
> > From: Robert Pluim <rpluim@gmail.com>
> > Cc: 21337@debbugs.gnu.org
> > Date: Wed, 26 Aug 2015 19:02:23 +0200
> > 
> > Step 5 should never happen, but because step 2 did not clear the
> > Available fd_set, and the HAVE_GNUTLS code incremented nfds, we think
> > there's data to be read.
> > 
> > The following patch, which zeros out Available when the GNUTLS code
> > does its thing has fixed things for me. I've convinced myself it has
> > no bad side-effects, but would appreciate a second opinion, especially
> > since the option also exists to just zero out Available
> > unconditionally when nfds==0.
> 
> Thanks for the investigation and the patch.  If no one objects in a
> few days, I will commit your changes.

Done.