Bug: dead group causes crash to desktop

[DangerousVanilla]

Describe the bug

Bug Description

Game crashed when entering a scripted sequence, I believe because all the in-group NPC's had died.

Expected Behavior

Game doesn't crash.

Steps to Reproduce

1. Allow all of your group members to die (random chance).
2. Trigger a scripted sequence where the characters gather together.
3. Receive a div/0 crash.

Additional Context

Kind of an edge case here I encountered but it should be handled to prevent crashing to desktop.
The error pointed to src/screens/level.py, line 592: 'rot_by = (180) / (len(npcs) - 1)' with a div/0 error.

Possible solutions:
A. Handle the exception in the event all group members have died (shouldn't be able to trigger a gathering sequence with them then I imagine...)

B. Prevent all group members from being able to die.

Version

0.1.0

Which aspect(s) of the project is this bug affecting?

game-gameplay

Screenshots

No response

Relevant log output

No response

Code of Conduct

• I agree to follow this project's Code of Conduct.

[HubertReX]

@DangerousVanilla by mistake, I've added a fix to this bug along with PR 243 In my opinion, it's fixed - please check it.