[gtk+] GtkApplication: implement the active-window property

[Matthias Clasen <matthiasc src gnome org>]

commit 1a6dd9fcd249cd81e0e65a37738b89517e42a81a
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu May 8 20:30:40 2014 -0400

    GtkApplication: implement the active-window property
    
    This was apparently just forgotten.
    First bug found by GtkInspector.

 gtk/gtkapplication.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkapplication.c b/gtk/gtkapplication.c
index c6f4795..a777ec6 100644
--- a/gtk/gtkapplication.c
+++ b/gtk/gtkapplication.c
@@ -722,6 +722,10 @@ gtk_application_get_property (GObject    *object,
       g_value_set_object (value, gtk_application_get_menubar (application));
       break;
 
+    case PROP_ACTIVE_WINDOW:
+      g_value_set_object (value, gtk_application_get_active_window (application));
+      break;
+
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;