bug#7848: 23.2.91; Can't build with MinGW

[Eli Zaretskii]

> Date: Sun, 16 Jan 2011 15:16:31 +0900
> From: Kazuhiro Ito <kzhr@d1.dion.ne.jp>
> Cc: 7848@debbugs.gnu.org
> 
> > Sorry.  Please try replacing this:
> > 
> >   SET_SYMBOL_VAL (XSYMBOL (Qlibpng_version), make_number (PNG_LIBPNG_VER));
> > 
> > with this:
> > 
> >   XSYMBOL (Qlibpng_version)->value = make_number (PNG_LIBPNG_VER);
> > 
> > and make a similar change in this line:
> > 
> >   SET_SYMBOL_VAL (XSYMBOL (Qlibpng_version), make_number (-1));
> > 
> > I cannot test this where I'm typing this mail, but if you tell me that
> > these two changes fix the problem, I will commit this change to the
> > release branch.
> 
> Thanks, I confirmed above changes fixed my problem (not tested in the
> case of no PNG support).

Thanks, I installed these changes on the emacs-23 branch.