$OpenBSD: patch-src_helper_png-write_cpp,v 1.1 2011/07/08 20:38:00 naddy Exp $

Fix build with png-1.5.

--- src/helper/png-write.cpp.orig	Wed Jul  6 19:28:18 2011
+++ src/helper/png-write.cpp	Wed Jul  6 19:28:41 2011
@@ -165,7 +165,7 @@ sp_png_write_rgba_striped(SPDocument *doc,
     /* Set error handling.  REQUIRED if you aren't supplying your own
      * error hadnling functions in the png_create_write_struct() call.
      */
-    if (setjmp(png_ptr->jmpbuf)) {
+    if (setjmp(png_jmpbuf(png_ptr))) {
         /* If we get here, we had a problem reading the file */
         fclose(fp);
         png_destroy_write_struct(&png_ptr, &info_ptr);