Fix bus for pages and page content

app/controllers/admin/pages_controller.rb

@@ -61,7 +61,7 @@ class Admin::PagesController < ApplicationController
   def update
     @item = Page.find(params[:id])
 	
-	if @item.module_app.key == 'page_content' && @item.page_contexts.blank?
+	if @item.module_app && @item.module_app.key == 'page_content' && @item.page_contexts.blank?
 	    @item.page_contexts.build(:create_user_id => current_user.id, :update_user_id => current_user.id )
 	end