[PATCH v4 0/1] MR6251: wineoss.drv: Fix work with synth devices

[Ivan Rozhuk (＠Ivan_83)]

Same code used for synth and for MIDI devices, but it try to count
Synth or MIDI device id from wine driver ID.
After this change device id is stored in struct and always correct.

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  v4: wineoss: Store the OSS device in midi_dest.
 
https://gitlab.winehq.org/wine/wine/-/merge_requests/6251