Weland Loads Walls Wrong - Here's a Fix

[deram_scholzara]

Still needs to be approved and pulled into master by treellama, but it's ready to go:
https://github.com/treellama/weland/pull/4

This makes it so that when using a shapes file where your Walls Collection sequence frames point to a bitmap with a different index from the frame, it'll still show up correctly when texturing floors/ceilings.

[treellama]

Thanks!