Unity crashes if the wrong list of particles gets assigned to the wrong trigger event type.

Repro steps:
1. Open Bug_Crash scene from attached project.
2. Press play.
3. Unity Crashes.

Expected outcome: error message / handling for exception.

Notes:
- Crash happens because of last line of ParticleTrigger script:
ps.SetTriggerParticles(ParticleSystemTriggerEventType.Outside, inside);
should be
ps.SetTriggerParticles(ParticleSystemTriggerEventType.Outside, outside);

Not a regression; new feature in 5.4.0b1