Can't send audio, if set_receive_sound is False

[Henning0]

Hi. Just upgraded from 1.6.1 to the latest git. After that I stumbled upon this:

Traceback (most recent call last):
  File "(...)/pymumble-bot/pymumble-bot.py", line 80, in <module>
    mumble.sound_output.add_sound(raw_audio)
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'add_sound'

Since d37c4c7 it seems to be necessary that set_receive_sound is True, if one want to send audio or use anything from sound_output. This kinda contradicts the name of the variable and the documentation.