[gnome-flashback] notifications: fix crash when removing monitor

[Alberts Muktupāvels <muktupavels src gnome org>]

commit be52844d0ce6253750f63c6496e18df05b436933
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Mon Sep 10 21:39:23 2018 +0300

    notifications: fix crash when removing monitor
    
    When bubble is added to stack we connect to destroy signal to
    remove bubble from stack when it is destroyed. When we move same
    bubble to other stack old signal handler remains connected and
    we end with destroy callback using already freed stack.
    
    Use g_signal_connect_object to make sure that signal handler is
    disconnected when stack is destroyed.

 gnome-flashback/libnotifications/nd-stack.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)
---
diff --git a/gnome-flashback/libnotifications/nd-stack.c b/gnome-flashback/libnotifications/nd-stack.c
index 7d6ab6f..574e8a1 100644
--- a/gnome-flashback/libnotifications/nd-stack.c
+++ b/gnome-flashback/libnotifications/nd-stack.c
@@ -320,10 +320,9 @@ nd_stack_add_bubble (NdStack  *stack,
         gtk_widget_show (GTK_WIDGET (bubble));
         gtk_window_move (GTK_WINDOW (bubble), x, y);
 
-        g_signal_connect_swapped (G_OBJECT (bubble),
-                                  "destroy",
-                                  G_CALLBACK (nd_stack_remove_bubble),
-                                  stack);
+        g_signal_connect_object (bubble, "destroy",
+                                 G_CALLBACK (nd_stack_remove_bubble), stack,
+                                 G_CONNECT_SWAPPED);
         stack->priv->bubbles = g_list_prepend (stack->priv->bubbles, bubble);
 }