Fixed PHP-1082: CommandCursor segfaults when server is closed
Use php_mongo_cursor_throw() instead of zend_throw_exception()
Merge pull request #682 from bjori/PHP-1082-cmdcursor-segfaults

Fixed PHP-1082: CommandCursor segfaults when server is closed

* bjori/PHP-1082-cmdcursor-segfaults:
  Use php_mongo_cursor_throw() instead of zend_throw_exception()
  Fixed PHP-1082: CommandCursor segfaults when server is closed