The history of this patch is unknown: it existed when ImageMagick was

migrated to Userland.

--- ImageMagick-6.8.3/coders/png.c.~1~ 2013-02-15 04:48:48.000000000 -0800

+++ ImageMagick-6.8.3/coders/png.c 2015-02-10 20:39:14.131500401 -0800

@@ -100,6 +100,10 @@

#include "png.h"

#include "zlib.h"

+#if PNG_LIBPNG_VER >= 10400

+#define trans_values trans_color

+#define trans trans_alpha

+#endif



/* ImageMagick differences */

#define first_scene scene