Description:
------------
Segmentation fault when try to get data after disconnect.

Test script:
---------------
$storage = new MogileFS();
//connect
$storage->connect('192.168.0.10', 6001, 'test');
//after disconnect
$storage->disconnect();
//try get
$fileInfo = $storage->get('test_name');

Expected result:
----------------
MogileFsException

Actual result:
--------------
Segmentation fault