Fix crash when loading multiplayer level

[pzychotic]

Pull Request Type

• [ ] GitHub Workflow changes
• [ ] Documentation or Wiki changes
• [ ] Build and Dependency changes
• [x] Runtime changes
  • [ ] Render changes
  • [ ] Audio changes
  • [ ] Input changes
  • [ ] Network changes
  • [x] Other changes

Description

Fix crash when loading multiplayer level with outside/terrain player spawn position.

player::start_roomnum and object::roomnum encode a terrain cell number with the highest bit set. So when accessing Terrain_seg[] we need to remove that bit to get a valid index.

Related Issues

Fixes #442

Screenshots (if applicable)

Checklist

• [x] I have tested my changes locally and verified that they work as intended.
• [x] I have documented any new or modified functionality.
• [x] I have reviewed the changes to ensure they do not introduce any unnecessary complexity or duplicate code.
• [x] I understand that by submitting this pull request, I am agreeing to license my contributions under the project's license.

Additional Comments