Fix Django 1.4 admin_site ForeignKeyRawIdWidget issue
Warning: sizeof(): Parameter must be an array or an object that implements Countable in /var/www/clients/client1/web1/web/wp-content/plugins/ad-injection/ad-injection.php on line 824
Warning: count(): Parameter must be an array or an object that implements Countable in /var/www/clients/client1/web1/web/wp-content/plugins/ad-injection/ad-injection.php on line 831
If you want use field widget from Django 1.3 in Django 1.4 you need patch it