This fixes use of multiple MIDI outputs while keeping the flexibility of
proper ALSA sequencer port subscriptions.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=52220Signed-off-by: Jacek Konieczny <jajcus@jajcus.net>
Signed-off-by: Andrew Eikum <aeikum@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>