1FreeDoom1 MAP28 has issue with prefab being too high in Blue Key room

[samboy]

In the Blue Key room, the prefab with the zombies on it is too high; the zombies end up walking through the ceiling but acting normal; it looks a little strange.

The solution is probably to increase the height of this particular prefab, or to raise the ceiling as needed in rooms with this prefab.

[samboy]

This was a simple clerical error: The prefab cage_medium_liq_LAVA did not have min_height set.

It was actually more bother to update the tests than fix the bug, since MAP28 was altered. Also, either the sorting of things in MAP29 and MAP30 were changed, or the placement of multiplayer things was altered (since MAP27 has a different number of monsters, so the monster to which theme code now has a different offset for which multiplayer goodie to drop with a monster). In either case, only MAP28 has a different single player experience.