From 6a5821d82c459840c12ab450acc325d8b0adca63 Mon Sep 17 00:00:00 2001
From: Nick Schermer <nick@xfce.org>
Date: Sun, 09 May 2010 16:27:52 +0000
Subject: Avoid disconnecting 0 handler.

---
diff --git a/libxfce4mixer/libxfce4mixer.c b/libxfce4mixer/libxfce4mixer.c
index be0f865..69746c0 100644
--- a/libxfce4mixer/libxfce4mixer.c
+++ b/libxfce4mixer/libxfce4mixer.c
@@ -203,7 +203,8 @@ void
 xfce_mixer_bus_disconnect (guint signal_handler_id)
 {
   g_return_if_fail (refcount > 0);
-  g_signal_handler_disconnect (bus, signal_handler_id);
+  if (signal_handler_id != 0)
+    g_signal_handler_disconnect (bus, signal_handler_id);
 }
 #endif
 
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