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

Fix build with png-1.5.

--- image.c.orig	Wed Jul  6 17:22:24 2011
+++ image.c	Wed Jul  6 17:22:58 2011
@@ -439,13 +439,13 @@ png_uint_32 ww, hh;
 		fclose(fp);
 		return NULL;
 		}
-	if(setjmp(png_ptr->jmpbuf))
+	if(setjmp(png_jmpbuf(png_ptr)))
 		{
 		png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
 		fclose(fp);
 		return NULL;
 		}
-	if(info_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
+	if(png_get_color_type(png_ptr, info_ptr) == PNG_COLOR_TYPE_RGB_ALPHA)
 		{
 		png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
 		fclose(fp);