$OpenBSD: patch-src_rstdrv_c,v 1.1 2011/07/08 20:38:01 naddy Exp $

Fix build with png-1.5.

--- src/rstdrv.c.orig	Wed Jul  6 11:19:00 2011
+++ src/rstdrv.c	Wed Jul  6 11:19:34 2011
@@ -54,6 +54,7 @@
 
 #ifdef HAVE_LIBPNG
 #  include <png.h>
+#  include <zlib.h>
 #endif
 
 #ifndef NONE_GUI
@@ -885,7 +886,7 @@ static void rstImagePng(gdImagePtr ihandle, FILE *prst
         return;
     }
 
-    if (setjmp(png_ptr->jmpbuf)) {
+    if (setjmp(png_jmpbuf(png_ptr))) {
         png_destroy_write_struct(&png_ptr, &info_ptr);
         return;
     }