Re: [PATCH v2 0/6] MR5773: mmdevapi: Fake success in a few IAudioSessionControl2 methods

[Huw Davies (＠huw)]

Huw Davies (@huw) commented about dlls/mmdevapi/session.c:
>  ret->master_vol = 1.f;
>
> - ret->display_name = duplicate_wstr(L"");

I think it would be better, especially given that we never free the sessions, to init this with `NULL` and fix up `duplicate_wstr()` to allocate an empty string in the case that the src is `NULL`.