$OpenBSD: patch-uta_mutex_h,v 1.1 2010/05/22 16:11:34 espie Exp $
--- uta/mutex.h.orig	Sat May 22 18:03:17 2010
+++ uta/mutex.h	Sat May 22 18:04:01 2010
@@ -26,6 +26,9 @@
 
 namespace uta {
 
+class DirectSurface;
+class ScreenSurface;
+
 ///Mutex class.
 class Mutex
 {