$NetBSD: patch-ab,v 1.2 2014/05/25 07:51:06 obache Exp $

* Fix build for png-1.4.x.

--- src/im_png.c.orig	2002-10-15 14:30:58.000000000 +0000
+++ src/im_png.c
@@ -273,7 +273,7 @@ png_read_start(image_png *im)
 	if (im->im.oi.cspace.depth != im->im.i.cspace.depth) {
 	    if (im->im.oi.cspace.type == IMAGE_CS_GRAY
 		&& im->im.oi.cspace.depth /* XXX ?! */)
-		png_set_gray_1_2_4_to_8(im->png);
+		png_set_expand_gray_1_2_4_to_8(im->png);
 	    else if (im->im.oi.cspace.depth == 16)
 		png_set_strip_16(im->png);
 	}