Hole in the geometry behind the evevator in Doom 2 MAP01

For some reason, this exact wall quad in this exact map is not built. The relevant quad building code is located in wad_parser/src/map/[vertices.rs](https://github.com/2017Knight2017/Vuldu/blob/master/crates/wad_parser/src/map/vertices.rs) (add_wall_quad closure).

<img width="500" alt="Image" src="https://github.com/user-attachments/assets/9d2c4676-c7ee-4675-b10c-5b0559988240" />