Cascade puts not working

[icorderi]

There seems to be a bug with P2P cascade put.
Start three simulators listening at [8123, 8125, 8127].

Run example from kinetic-py.

Prints:

Writing { Key: a9161851-01ea-49fa-af08-56dda9ccc4ee, Value: 0a4ade7b-044f-4869-a987-d452208e0aa1 } on first device
Copying key from first to second device and telling him to copy to third
Read { Key: a9161851-01ea-49fa-af08-56dda9ccc4ee, Value: 0a4ade7b-044f-4869-a987-d452208e0aa1 } from second device
Traceback (most recent call last):
  File "examples/p2p_pipe.py", line 31, in <module>
    print 'Read { Key: %s, Value: %s } from third device' % (kv.key, kv.value)
AttributeError: 'NoneType' object has no attribute 'key'

The third device does not have the key.

This bug was first reported at Kinetic/kinetic-py#12