Fix MOD pattern break with pattern delay

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
[test] Add OpenMPT DelayBreak.mod test case

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Use full Protracker sample loop in OpenMPT MODs

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