DEBUG("(%d, %d)\n", curr ? curr->get_id() : -1, next ? next->get_id() : -1);
/* next == NULL -> don't take any more steps */
if (!next)
return false;
DEBUG("(%d, %d)\n", curr ? curr->get_id() : -1, next ? next->get_id() : -1);
/* next == NULL -> don't take any more steps */
if (!next)
return false;