$OpenBSD: patch-screenshot_c,v 1.1 2011/07/08 20:38:01 naddy Exp $
--- screenshot.c.orig	Tue Jul  5 23:21:29 2011
+++ screenshot.c	Tue Jul  5 23:21:41 2011
@@ -49,6 +49,7 @@
 #ifdef USE_LIBPNG
 
 #include <png.h>
+#include <zlib.h>
 
 static int get_rgb32_data( libspectrum_byte *rgb32_data, size_t stride,
 			   size_t height, size_t width );
