The previous change only affected mimics that started mimicing after the
level was created. This change tries to perform a similar behavior for
randomly placed mimics that are forced to mimic a boulder on special levels.
In this case, since the symbol is fixed and the location is "random", try
several times to find a non-trap location for such a mimic.
<Someone> reported that randomly placed aquatic monsters can end up in
lava. The placement code allowed lava whenever the WET flag was passed to
it. This was so passing (WET|DRY) would match all locations, but it's not
appropriate for when only the flag WET is used. Since we have no levels
currently affected by this bug, I fixed it only in the trunk.
This solution is mostly a band-aid. Make sure information set by join_map
that is overlaid by the MAP is cleared out. This ensures that place_branch
will never consider invalid data. A new function, remove_rooms(), with a
helper, remove_room(), takes care of this, but only for rooms created by
join_map, which addresses the only known case that causes this problem.
There's a possibility that some other strange behavior, especially in
minetn-6, will be fixed by this as well. The problem of disconnected caves
on minetn-6 is not yet addressed.
Also, add a check to lev_comp.y to make sure the required fg semantics of
joined levels (fg must be ROOM or CORR) are actually met. Doesn't affect
any levels currently included in the distro, but might address levels
others are trying to make.
On mazelike levels, containers had to be listed before their objects. But,
for roomfilled levels, containers had to be listed _after_ the objects. All
our current levels that use containers with objects are mazelike, so I
changed the room behavior, updating the comment in lev_comp.y to match.
Other items/monsters are still processed in reverse on roomfilled special
levels, but I think this is OK.
