$NetBSD: patch-aa,v 1.6 2011/01/29 12:40:14 wiz Exp $

Fix build with png-1.5.
https://savannah.gnu.org/bugs/index.php?32290

--- Source/NSBitmapImageRep+PNG.m.orig	2008-06-10 04:01:49.000000000 +0000
+++ Source/NSBitmapImageRep+PNG.m
@@ -225,7 +225,7 @@ static void reader_func(png_structp png_
     initWithBytesNoCopy: buf
 		 length: bytes_per_row * height];
 
-  if (PNG_INFO_gAMA & png_info->valid)
+  if (png_get_valid(png_struct, png_info, PNG_INFO_gAMA))
   {
     double file_gamma = 2.2;
     if (PNG_FLOATING_POINT)