$NetBSD: patch-aw,v 1.3 2006/05/03 12:32:10 drochner Exp $

--- src/post/audio/upmix.c.orig	2006-05-03 14:21:23.000000000 +0200
+++ src/post/audio/upmix.c
@@ -395,6 +395,8 @@ static post_plugin_t *upmix_open_plugin(
   
   _x_post_init(&this->post, 1, 0);
 
+  pthread_mutex_init(&this->lock, 0);
+
   this->params.cut_off_freq = 100;
   
   port = _x_post_intercept_audio_port(&this->post, audio_target[0], &input, &output);