[gnome-applets] windowpicker/task-title.c: Disconnect signal handlers in dispose function

[Sebastian Geiger <segeiger src gnome org>]

commit 1eb65a2240aecfcc4303ffaf6ac0ce8d3209c29a
Author: Sebastian Geiger <sbastig gmx net>
Date:   Sun Jun 7 14:45:01 2015 +0200

    windowpicker/task-title.c: Disconnect signal handlers in dispose function
    
    When the object is destroyed the signal handlers
    need to be disconnected to avoid that they
    are called after the object has already been destroyed.
    
    This only affects signal handlers that are not related to the object itself,
    such as for WnckScreen.

 windowpicker/src/task-title.c |   10 ++++++----
 1 files changed, 6 insertions(+), 4 deletions(-)
---
diff --git a/windowpicker/src/task-title.c b/windowpicker/src/task-title.c
index 242fc01..db9e003 100644
--- a/windowpicker/src/task-title.c
+++ b/windowpicker/src/task-title.c
@@ -185,6 +185,7 @@ static void hide_title(TaskTitle *title) {
     gtk_widget_set_tooltip_text (GTK_WIDGET (title), NULL);
     gtk_widget_hide (title->priv->grid);
 }
+
 static void
 on_active_window_changed (WnckScreen *screen,
                           WnckWindow *old_window,
@@ -405,14 +406,15 @@ task_title_setup (TaskTitle *title)
 }
 
 static void
-task_title_finalize (GObject *object)
+task_title_dispose (GObject *object)
 {
     TaskTitle *title = TASK_TITLE (object);
 
+    g_signal_handlers_disconnect_by_func (title->priv->screen, on_active_window_changed, title);
     disconnect_window (title);
-    g_object_unref (title->priv->quit_icon);
 
-    G_OBJECT_CLASS (task_title_parent_class)->finalize (object);
+    g_clear_object (&title->priv->quit_icon);
+    G_OBJECT_CLASS (task_title_parent_class)->dispose (object);
 }
 
 static GObject *
@@ -443,7 +445,7 @@ task_title_class_init (TaskTitleClass *klass)
     GObjectClass *obj_class = G_OBJECT_CLASS (klass);
 
     obj_class->constructor = task_title_constructor;
-    obj_class->finalize = task_title_finalize;
+    obj_class->dispose = task_title_dispose;
 }
 
 GtkWidget *