[CM] Midi microtuning in cm2

[Orm Finnendahl]

Hi,

 just for the record: Yesterday I fixed some minor bugs in cm2 (common
lisp port) leading to wrong behaviour when using midi microtuning with
channel offsets. Probably nobody ever needed/used that and it is
really ancient by now. But since I could imagine that cm3 still uses
that part of the code I thought it might be worthwile mentioning here.

The code is pushed to ormf/cm-incudine at github.

--
Orm