Add quirk for S3M-style retrig when count is 0

Reported by Mruczek1488, test case in mod.aurora hihats.

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
[test] Update retrig effect test

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Partial fix for MilkyTracker delay quirk

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>