Fixed Radiant caverns zone texture errors

[gregory_house]

Well, no screenshots this time, but there's only a couple of them:
(2483,1379,576) both the hole in the ceiling and in the floor, and the different texture around the hole in the floor.
(-733,-1419,704) both ceiling and floor.

EDIT:Also, RCZWLL4 still has some blue in it, and it's all over the place.