Damper MIDI Event crash on Damper off

[AlmostSeagull]

When the Damper Off event is processed, if any notes have been extended by the Damper being on, the game crashes on instruction 0x80735144 due to an invalid pointer.

Intended behaviour is as seen in the code for Note Off, where the pointer IS initiated using instructions 0x807346d8-0x807346f0

Inserting this code before 0x80735140 should fix this issue. (fingers crossed)