Fixes some crashing that would occur when canceling MIDI import.  Previously, I may have accidentally placed duplicate MIDI destruction code that would cause double free-ing of memory.
Fixes some crashing that would occur when canceling MIDI import.  Previously, I may have accidentally placed duplicate MIDI destruction code that would cause double free-ing of memory.

git-svn-id: 80300035c0945e1dead713df30ec139394dadc1f@386 1b2aedea-9eff-cdc0-263b-b87a75789507

cincodenada/editor-on-fire,cincodenada/editor-on-fire,cincodenada/editor-on-fire,cincodenada/editor-on-fire