$NetBSD: patch-aa,v 1.6 2011/02/14 19:37:27 wiz Exp $

Fix build with png-1.5.
http://xplanet.sourceforge.net/FUDforum2/index.php?t=msg&th=572&start=0&S=f7bd28527eea8e9fac72e18b459d4172

--- src/libimage/png.c.orig	2006-03-25 22:50:51.000000000 +0000
+++ src/libimage/png.c	2011-01-19 10:20:09.000000000 +0000
@@ -57,7 +57,7 @@
         return(0);
     }
   
-    if (setjmp(png_ptr->jmpbuf))
+    if (setjmp(png_jmpbuf(png_ptr)))
     {
         png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp) NULL);
         fclose(infile);
