Gnoll geomancer places rocks on exit tiles

[Howdidibreakit]

Sometimes, the gnoll geomancer can generate rocks on the same tiles as the metal ones that surround the exit. This causes a visual bug due to the tiles being on a higher layer than the rocks, so it looks cut off. I don't have a screenshot, but it should just be a really easy fix.

[00-Evan]

I've edited your post as I do not accept code contributions/suggestions. Will look into this quirk regardless.