[gnome-calendar/calendar-management] window: cast to GtkDialog correctly

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 94489784d6430145f3de48ea8b949415cc8b765f
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Wed Jan 14 00:34:39 2015 -0200

    window: cast to GtkDialog correctly

 src/gcal-window.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/gcal-window.c b/src/gcal-window.c
index 2f194ad..4a03096 100644
--- a/src/gcal-window.c
+++ b/src/gcal-window.c
@@ -1556,5 +1556,5 @@ gcal_window_show_sources_dialog (GcalWindow *window)
 
   priv = gcal_window_get_instance_private (window);
 
-  gtk_dialog_run (priv->source_dialog);
+  gtk_dialog_run (GTK_DIALOG (priv->source_dialog));
 }