bug#15688: 24.3.50; clear-temporary-overlay-map

[Eli Zaretskii]

> Date: Fri, 24 Jan 2014 09:55:41 -0500
> From: Richard Stallman <rms@gnu.org>
> Cc: 15688@debbugs.gnu.org
> 
> I suggest adding
> 
> enum gc_mark_stack { gc_mark_stack_value = GC_MARK_STACK; }; in lisp.h
> or some source file.  Then it will be possible to view
> gc_mark_stack_value in GDB.

I think GDB can display values of macros, just use it in the "print"
command.