IT slide issues #45
Description
As reported by Thomas Neumann (@neumatho):
I found a module that has some slide issues. It happens at position
4 and 5 at channel 2 and 3. There is a lot of E10 effects and the note
is sliding, but it sounds like it is sliding too far. I do not know,
if it is the speed or there is missing some bounds checking. Maybe you
can investigate it further.