bug#31288: 27.0.50; [PATCH] Make cairo build somewhat usable

[Eli Zaretskii]

> From: Ari Roponen <ari.roponen@gmail.com>
> Cc: 31288@debbugs.gnu.org
> Date: Fri, 27 Apr 2018 17:35:58 +0300
> 
> >> -#if defined (USE_GTK) && defined (HAVE_GTK3)
> >> +      /* FIXME */
> >> +#if 0 && defined (USE_GTK) && defined (HAVE_GTK3)
> >>        if (FRAME_GTK_WIDGET (f))
> >>          {
> >>            GdkWindow *w = gtk_widget_get_window (FRAME_GTK_WIDGET (f));
> >
> > This hunk doesn't look right.  If the code in question causes some
> > trouble to a Cairo build, please ifdef it out only when USE_CAIRO is
> > defined, not unconditionally.  And if that still needs a FIXME
> > comment, please add some description of what needs to be fixed and
> > why.
> >
> 
> That hunk is inside #ifdef USE_CAIRO, like almost the whole body of
> x_update_end.

Ah, sorry I missed that.  Still, what is the FIXME there? why not
simply remove that part?