settings: Use g_signal_connect_object

The panel might go away (e.g. when moved between outputs). This
makes sure the notification list does not send to an already
disposed object.
Signed-off-by: Guido Günther <guido.gunther@puri.sm>

src/settings.c

@@ -452,10 +452,11 @@ phosh_settings_constructed (GObject *object)
                            create_notification_row,
                            NULL,
                            NULL);
-  g_signal_connect_swapped (phosh_notify_manager_get_list (manager),
-                            "items-changed",
-                            G_CALLBACK (on_notifcation_items_changed),
-                            self);
+  g_signal_connect_object (phosh_notify_manager_get_list (manager),
+                           "items-changed",
+                           G_CALLBACK (on_notifcation_items_changed),
+                           self,
+                           G_CONNECT_SWAPPED);
 
   G_OBJECT_CLASS (phosh_settings_parent_class)->constructed (object);
 }