[gnome-calendar] Fixed segfault on gcal_window_show_hide_actor_cb.

[Erick PÃrez Castellanos <erickpc src gnome org>]

commit 9d151a625a3cf798f80394001287eddb8600c143
Author: Erick PÃrez Castellanos <erick red gmail com>
Date:   Fri Aug 24 23:21:12 2012 -0400

    Fixed segfault on gcal_window_show_hide_actor_cb.

 src/gcal-window.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/gcal-window.c b/src/gcal-window.c
index 8ca4249..3e54c35 100644
--- a/src/gcal-window.c
+++ b/src/gcal-window.c
@@ -676,7 +676,7 @@ gcal_window_sources_shown (GcalToolbar *main_toolbar,
                             gpointer    user_data)
 {
   GcalWindowPrivate *priv;
-  priv  = ((GcalWindow*) user_data)->priv;
+  priv  = GCAL_WINDOW (user_data)->priv;
 
   if (visible)
     {
@@ -694,7 +694,7 @@ gcal_window_sources_shown (GcalToolbar *main_toolbar,
       g_signal_connect (priv->sources_actor,
                         "transition-stopped::opacity",
                         G_CALLBACK (gcal_window_show_hide_actor_cb),
-                        NULL);
+                        user_data);
     }
 }