[gnome-calendar] window: fix signal name

[Erick Pérez Castellanos <erickpc src gnome org>]

commit 34f92669664a5b143c78e54b49167879ff13e58f
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Mon Feb 9 12:10:31 2015 -0200

    window: fix signal name

 data/ui/window.ui |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/data/ui/window.ui b/data/ui/window.ui
index 811a38f..cb5bf68 100644
--- a/data/ui/window.ui
+++ b/data/ui/window.ui
@@ -364,7 +364,7 @@
             <property name="can_focus">True</property>
             <property name="relief">none</property>
             <property name="receives_default">True</property>
-            <signal name="clicked" handler="open_source_dialog" object="GcalWindow" swapped="no" />
+            <signal name="clicked" handler="show_source_dialog" object="GcalWindow" swapped="no" />
             <child>
               <object class="GtkBox" id="add_button_box">
                 <property name="visible">True</property>