[gnome-shell] shell-window-tracker: Fix signal handler leak

[Adel Gadllah <agadllah src gnome org>]

commit 1309b64c336ed38d7cd05821b02256f72ba0bcc8
Author: Adel Gadllah <adel gadllah gmail com>
Date:   Sun Jun 12 14:03:18 2011 +0200

    shell-window-tracker: Fix signal handler leak
    
    Disconnect the on_wm_class_changed handler when removing a window
    in disassociate_window().
    
    https://bugzilla.gnome.org/show_bug.cgi?id=652388

 src/shell-window-tracker.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/src/shell-window-tracker.c b/src/shell-window-tracker.c
index 9811245..4b7b2d4 100644
--- a/src/shell-window-tracker.c
+++ b/src/shell-window-tracker.c
@@ -487,7 +487,10 @@ disassociate_window (ShellWindowTracker   *self,
   g_hash_table_remove (self->window_to_app, window);
 
   if (shell_window_tracker_is_window_interesting (window))
+    {
       _shell_app_remove_window (app, window);
+      g_signal_handlers_disconnect_by_func (window, G_CALLBACK(on_wm_class_changed), self);
+    }
 
   g_signal_emit (self, signals[TRACKED_WINDOWS_CHANGED], 0);