Fix site preference openness problem

app/controllers/application_controller.rb

@@ -18,7 +18,7 @@ class ApplicationController < ActionController::Base
   helper_attr :site_valid_locales
 
   def check_backend_openness
-    if !Me.backend_openness_on
+    if Site.first.backend_openness_on
       redirect_to '/users/sign_in'   if not (authenticate_user! and is_member? )
     end
   end

app/controllers/pages_controller.rb

@@ -113,7 +113,7 @@ class PagesController < ApplicationController
   end
 
   def check_frontend_open
-    if Me.frontend_closed && current_user.nil?  #Need to be change
+    if !Site.first.frontend_closed && current_user.nil?  #Need to be change
       redirect_to '/admin/dashboards'  
     end
   end