Log Message:
fasttracker2: update to b129

Changes since b127:

Beta #129 - 10.01.2019
- Prevent doing 64-bit MULs if the scopes are inactive (rate calculation)
- WaitVBL() function for scopes and video (when no vsync) has been changed to
  include fractional precision for "next frame time" counter. Note \ 
that this
  is a minor change and does not magically remove video stuttering.

Beta #128 - 06.01.2019
- If speed (ticks per row) is set to 0, reset it to the initial value when
  pressing play.
- Clamp BPM/speed when loading modules so that the values are not illegal
- Some other minor fixes
- Code cleanup