// aux::pointers::reference_ptr<Object> to Creature
    template< >
    struct object_converter< Creature, aux::pointers::reference_ptr<Object> >
    {
        static inline Creature* convert(aux::pointers::reference_ptr<Object>& obj)
        {
            return ((obj != (Object*)NULL) && obj->isUnit() ? (Creature*)obj.get() : NULL);
        }
    };