If you have the "wrong" kind of MIDI CC, the interpolation for the list is set
to Linear, which causes interpolation to return audio time stamps instead of
beat time. Because of the asymmetrical transforms, this causes iterators over
the Sequence to go haywire and create an infinite loop.
This fix changes ControlList behavior to always return times in the time domain
of the list.
b5f1c5b0dd