gentoo-overlay/media-gfx/xli/files/xli-1.17.0-libpng14.patch

http://aur.archlinux.org/packages.php?ID=1676
http://archwyrm.net/~me/xli-libpng.diff

--- a/png.c
+++ b/png.c
@@ -27,7 +27,7 @@
 	if (ret != 8)
 		return 0;
 
-	ret = png_check_sig(buf, 8);
+	ret = !png_sig_cmp(buf, 0, 8);
 
 	return (ret);
 }