bug#7716: 23.2.91; Pretest Windows binary doesn't support PNG images

[Eli Zaretskii]

> Date: Fri, 24 Dec 2010 17:56:35 -0500
> From: Sean Sieger <sean.sieger@gmail.com>
> Cc: 7716@debbugs.gnu.org
> 
> and http://www.libpng.org/pub/png/libpng.html
> 
> libpng version 1.4.3 - June 26, 2010

Are there Windows binaries available for this version of libpng
somewhere?  The GnuWin32 binaries are for version 1.2.37, not for
1.4.x.  This could be the source of incompatibilities which could
potentially prevent display of PNG images.  I see some hits in Google
for "libpng 1.4 vs 1.2 incompatibilities", and they seem to say that
these two versions are indeed incompatible.

FWIW, I have headers and binaries for version 1.2.8.