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

[Sean Sieger]

Eli Zaretskii <eliz@gnu.org> writes:

    > 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.

There are security issues with those.