Deleting ghost track causes crash

[davidhealey]

If I have two tracks and I set the second track's ghost track to be the first track. Then I delete the first track, Qtractor crashes.

[rncbc]

fixed in 945d2cc

thanks

[windowsrefund]

It seems (potentially) related that a crash is now caused by deleting a duplicated MIDI track. How to reproduce:

1. Duplicate a track with data
2. Attempt to remove the duplicated track

I can break this out into a separate issue if needed and/or build against a previous commit in order to A/B.

[rncbc]

now fixed in edf984b

thanks again

[windowsrefund]

Seems this can be closed.