can't use two statements per connection

static int stmt_cursor_fetch(MYSQL_STMT *stmt, uchar **row)

{

  uchar buf[STMT_ID_LENGTH + 4];

  MYSQL_DATA *result= &stmt->result;

  DBUG_ENTER("stmt_cursor_fetch");

  if (stmt->state < MYSQL_STMT_USE_OR_STORE_CALLED)

  {

    SET_CLIENT_STMT_ERROR(stmt, CR_COMMANDS_OUT_OF_SYNC, SQLSTATE_UNKNOWN, 0);

    DBUG_RETURN(1);

  }

  /* do we have some prefetched rows available ? */

  if (stmt->result_cursor)

    DBUG_RETURN(stmt_buffered_fetch(stmt, row));

  if (stmt->mysql->server_status & SERVER_STATUS_LAST_ROW_SENT)

    stmt->mysql->server_status&=  ~SERVER_STATUS_LAST_ROW_SENT;