Re: [PATCH v4 0/9] MR3218: wine{alsa,coreaudio,oss,pulse}: Move session_init_vols, create_session, get_audio_session into mmdevapi.

[Huw Davies (＠huw)]

I'm travelling right now so don't have a lot of time to look at the `GUID_NULL` thing.  I would approve the first eight commits, so if you can make more progress without the last commit it might be better to remove that from this MR.