InstrumentSoundShaping: ensure that release time is never longer than the volume envelope, if volume envelope is active
This saves CPU on certain instruments, like Monstro.
There's no point in running the note beyond the end of the volume envelope, ever, so let's not do that.
Merge pull request #990 from diizy/stable-1.1

InstrumentSoundShaping: ensure that release time is never longer than th...