getRecenetMessages returns message "None"

Hello, I can't get text of message.
for example:

```
friend = client.contacts[14]
messages = friend.getRecentMessages(count=1)
for msg in messages:
print msg.text
```

return
`None`

and Echo bot example the same problem - message.text == None
here is output (debug mode),message.text is None!:
`Operation(status=None, checkSum=None, param3=None, param2=None, param1='0', createdTime=1459391203879, message=Message(contentType=0, hasContent=False, text=None, id='4102847129444', to='ufb1d354a313a0843e2ffa15700abf757', contentPreview=None, location=None, deliveredTime=0, createdTime=1459391203874, _from='u63183d886f2793bbfe7305f5f9bd804a', contentMetadata={'e2eeVersion': '1'}, toType=0), reqSeq=0, type=26, revision=170606)`