[gnome-shell] AppSwitcher: Remove a lost timeout on destroy

[Rui Matos <rtcm src gnome org>]

commit 5faeaa2028c7328413ffa6a60bf8479130b87dcb
Author: Rui Matos <tiagomatos gmail com>
Date:   Sat Dec 1 20:40:13 2012 +0100

    AppSwitcher: Remove a lost timeout on destroy
    
    Doesn't look harmful but there's no point in running this code after
    we're destroyed.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=689528

 js/ui/altTab.js |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/js/ui/altTab.js b/js/ui/altTab.js
index 74a03a0..b587219 100644
--- a/js/ui/altTab.js
+++ b/js/ui/altTab.js
@@ -417,6 +417,13 @@ const AppSwitcher = new Lang.Class({
         this._iconSize = 0;
         this._altTabPopup = altTabPopup;
         this._mouseTimeOutId = 0;
+
+        this.actor.connect('destroy', Lang.bind(this, this._onDestroy));
+    },
+
+    _onDestroy: function() {
+        if (this._mouseTimeOutId != 0)
+            Mainloop.source_remove(this._mouseTimeOutId);
     },
 
     _getPreferredHeight: function (actor, forWidth, alloc) {