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Recent change to xfns.c breaks compilation

From: Kim F. Storm
Subject: Recent change to xfns.c breaks compilation
Date: 13 Jul 2003 03:23:42 +0200

This change:

2003-07-12  Richard M. Stallman  <address@hidden>

        * xfns.c: Include libpng/png.h instead of png.h.

causes problems on my GNU/Linux system (redhat 6.2) where png.h is in

What is the rationale for that change?

Since configure only checks for the presence of png.h (and not
libpng/png.h), I think we need to check for both and condition the
#include with HAVE_PNG_H and HAVE_LIBPNG_PNG_H.

Kim F. Storm <address@hidden> http://www.cua.dk

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