bug#21428: 24.5; Crash of emacs on OS X, installed via homebrew cask

[Eli Zaretskii]

> From: Rainer M Krug <Rainer@krugs.de>
> Cc: 21428@debbugs.gnu.org,  mituharu+bug-gnu-emacs-mac@math.s.chiba-u.ac.jp
> Date: Mon, 28 Sep 2015 13:27:09 +0200

I've found something that could explain the crashes due to invalid
faces.  Could you please update from Git, rebuild Emacs, and see if
the crashes in get_glyph_face_and_encoding due to 'face' being NULL
are solved?  Please run Emacs under GDB as usual, _without_ setting
the following 3 variables to t:

   inhibit-try-cursor-movement
   inhibit-try-window-id
   inhibit-try-window-reusing

Thanks.