Log Message:
audio/fasttracker2: Updates to v1.22

Changes since v1.21:

v1.22 - 27.04.2020
- Fixed crash when loading XMs with pattern lengths above 256. They are now
  safely truncated, and the user gets a warning message about the truncation.
- Allow loading overflown BPM/speed values from quirky XMs, up to BPM 999
  and speed 99 ("jk_error_txt.xm" is an example for quirky BPM/speed \ 
values).
- Tiny code cleanup