This update for schismtracker fixes the following issues:

The following security issues were fixed:

- CVE-2019-14523: Fixed an integer underflow in the Amiga Oktalyzer parser (boo#1144266).
- CVE-2019-14524: Fixed a heap overflow in the MTM loader (boo#1144261).

The following non-security issues were fixed:

- Support 15-channel MOD files.
- Support undocumented MIDI macro characters, and support character p (MIDI program) properly.

This update was imported from the openSUSE:Leap:15.0:Update update project.