[glade] Fix build warnings

[Juan Pablo Ugarte <jpu src gnome org>]

commit ee2820fce6073513f217c2915c63f5b7db2c6f9a
Author: Juan Pablo Ugarte <juanpablougarte gmail com>
Date:   Sat Oct 13 12:08:11 2012 -0300

    Fix build warnings

 plugins/gtk+/glade-gtk-activatable.c |    6 ++----
 1 files changed, 2 insertions(+), 4 deletions(-)
---
diff --git a/plugins/gtk+/glade-gtk-activatable.c b/plugins/gtk+/glade-gtk-activatable.c
index 244fc1f..7cf9bf5 100644
--- a/plugins/gtk+/glade-gtk-activatable.c
+++ b/plugins/gtk+/glade-gtk-activatable.c
@@ -77,10 +77,8 @@ glade_gtk_activatable_evaluate_property_sensitivity (GObject *object,
 
   if (!strcmp (id, "related-action"))
     {
-      gboolean use_appearance = gtk_activatable_get_use_action_appearance (GTK_ACTIVATABLE (object));
-      GtkAction *action = g_value_get_object (value);
-
-      update_use_action_appearance (gwidget, TRUE, action);
+      update_use_action_appearance (gwidget, TRUE, 
+                                    g_value_get_object (value) != NULL);
     }
   else if (!strcmp (id, "use-action-appearance"))
     {