Random crash in SID

### System Information

Arch Linux with Wayland

### LMMS Version(s)

master

### Bug Summary

Debug builds of LMMS crash randomly when playing "Greippi - Krem Kaakkuja (Second Flight Remix)" due to segmentation faults. The crashes seem to be caused by the SID instrument(s) used in the song.

### Expected Behaviour

No crash.

### Steps To Reproduce

1. Start a debug build of LMMS.
2. Load "Greippi - Krem Kaakkuja (Second Flight Remix)".
3. Play the song until it crashes. Due to the random behavior this might be system dependent.

### Logs

Stack Trace

libsid.so!reSID::EnvelopeGenerator::clock(reSID::EnvelopeGenerator * const this, reSID::cycle_count delta_t) (/home/michael/Eigene Dateien/Development/LMMS/lmms-dev-mg/lmms/plugins/Sid/resid/resid/envelope.h:269)

libsid.so!reSID::SID::clock(reSID::SID * const this, reSID::cycle_count delta_t) (/home/michael/Eigene Dateien/Development/LMMS/lmms-dev-mg/lmms/plugins/Sid/resid/resid/sid.cc:758)

libsid.so!reSID::SID::clock_fast(reSID::SID * const this, reSID::cycle_count & delta_t, short * buf, int n, int interleave) (/home/michael/Eigene Dateien/Development/LMMS/lmms-dev-mg/lmms/plugins/Sid/resid/resid/sid.cc:867)

libsid.so!reSID::SID::clock(reSID::SID * const this, reSID::cycle_count & delta_t, short * buf, int n, int interleave) (/home/michael/Eigene Dateien/Development/LMMS/lmms-dev-mg/lmms/plugins/Sid/resid/resid/sid.cc:841)

libsid.so!lmms::sid_fillbuffer(unsigned char * sidreg, reSID::SID * sid, int tdelta, short * ptr, int samples) (/home/michael/Eigene Dateien/Development/LMMS/lmms-dev-mg/lmms/plugins/Sid/SidInstrument.cpp:273)

libsid.so!lmms::SidInstrument::playNote(lmms::SidInstrument * const this, lmms::NotePlayHandle * _n, lmms::SampleFrame * _working_buffer) (/home/michael/Eigene Dateien/Development/LMMS/lmms-dev-mg/lmms/plugins/Sid/SidInstrument.cpp:413)

lmms::InstrumentTrack::playNote(lmms::InstrumentTrack * const this, lmms::NotePlayHandle * n, lmms::SampleFrame * workingBuffer) (/home/michael/Eigene Dateien/Development/LMMS/lmms-dev-mg/lmms/src/tracks/InstrumentTrack.cpp:584)

lmms::NotePlayHandle::play(lmms::NotePlayHandle * const this, lmms::SampleFrame * _working_buffer) (/home/michael/Eigene Dateien/Development/LMMS/lmms-dev-mg/lmms/src/core/NotePlayHandle.cpp:263)

lmms::PlayHandle::doProcessing(lmms::PlayHandle * const this) (/home/michael/Eigene Dateien/Development/LMMS/lmms-dev-mg/lmms/src/core/PlayHandle.cpp:59)

lmms::ThreadableJob::process(lmms::ThreadableJob * const this) (/home/michael/Eigene Dateien/Development/LMMS/lmms-dev-mg/lmms/include/ThreadableJob.h:77)

lmms::AudioEngineWorkerThread::JobQueue::run(lmms::AudioEngineWorkerThread::JobQueue * const this) (/home/michael/Eigene Dateien/Development/LMMS/lmms-dev-mg/lmms/src/core/AudioEngineWorkerThread.cpp:87)

lmms::AudioEngineWorkerThread::startAndWaitForJobs() (/home/michael/Eigene Dateien/Development/LMMS/lmms-dev-mg/lmms/src/core/AudioEngineWorkerThread.cpp:160)

lmms::AudioEngine::renderStageInstruments(lmms::AudioEngine * const this) (/home/michael/Eigene Dateien/Development/LMMS/lmms-dev-mg/lmms/src/core/AudioEngine.cpp:340)

lmms::AudioEngine::renderNextBuffer(lmms::AudioEngine * const this) (/home/michael/Eigene Dateien/Development/LMMS/lmms-dev-mg/lmms/src/core/AudioEngine.cpp:409)

lmms::AudioEngine::fifoWriter::run(lmms::AudioEngine::fifoWriter * const this) (/home/michael/Eigene Dateien/Development/LMMS/lmms-dev-mg/lmms/src/core/AudioEngine.cpp:1111)

libQt5Core.so.5![Unknown/Just-In-Time compiled code] (Unbekannte Quelle:0)

### Please search the issue tracker for existing bug reports before submitting your own.

- [X] I have searched all existing issues and confirmed that this is not a duplicate.

Reproduce the crash in a debug build by loading “Greippi - Krem Kaakkuja (Second Flight Remix)” and playing it until failure. Start with plugins/Sid/resid/resid/envelope.h:269, then trace through sid.cc and plugins/Sid/SidInstrument.cpp using the supplied stack trace. Done means the song can play without a segmentation fault.

Written by the indexing model from the issue text.