Fixed PHP-1048 Segfault during shutdown attempting to kill rogue cursors after a failover
Merge pull request #656 from bjori/PHP-1048-segfault-during-shutdown

PHP-1048: Fix segfault during shutdown killing cursors after failover

* bjori/PHP-1048-segfault-during-shutdown:
  Fixed PHP-1048 Segfault during shutdown attempting to kill rogue cursors after a failover