Bug #29185 Large IN list crashes mysqld with cluster and condition pushdown

      Note - doing it recursively causes stack issues for

      big IN clauses

    */

    if (prev != NULL)

    {

      next= prev= NULL;

      return;

    }

    Ndb_cond *n= next;

    while (n)

    {

      Ndb_cond *tmp= n;

      n= n->next;

      tmp->next= NULL;

      delete tmp;

    }

    next= prev= NULL;