[AD] [WIN] MIDI sound restore at exit (fixed!)

[Javier González <xaviergonz@xxxxxxxxxx>]

Hello, it was a sillt mistake that was causing the MIDI to not restore
properly
it's cause this line
  id = (midi_driver->id & 0xFF) - 'A' - 1;
must be this line
  id = (midi_driver->id & 0xFF) - 'A';

since with the first line, if we use the first midi driver we would get a id
of -1 instead of 0
why windows doesn't complain? cause it's windows i guess :)
that was causing the initial_volume to be always retrieved as 0xFFFFFFFF
instead
of the real one

well, fixed

Attachment: wmidi.dif
Description: video/dv