[gnome-clocks] Clear the window pointer upon destroy

[Paolo Borelli <pborelli src gnome org>]

commit 2942065490bdc7faf81aba96ff897bb38fef9daa
Author: Paolo Borelli <pborelli gnome org>
Date:   Sun Aug 31 19:08:31 2014 +0200

    Clear the window pointer upon destroy
    
    This does not happen today, but it is more correct

 src/application.vala |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/src/application.vala b/src/application.vala
index f769c11..294737c 100644
--- a/src/application.vala
+++ b/src/application.vala
@@ -37,6 +37,9 @@ public class Application : Gtk.Application {
     private void ensure_window () {
         if (window == null) {
             window = new Window (this);
+            window.destroy.connect (() => {
+                window = null;
+            });
         }
     }