When place_object() puts a non-boulder underneath a boulder, make it
put the non-boulder under all the boulders there rather than just under
the topmost one. Otherwise the map display will show the non-boulder
rather than the 2nd boulder if the top boulder gets moved away by some
means other than pushing. (Pushing explicitly brings lower boulder to
top of pile in order to try to push it next.)
Reproduce by: wish for boulder--it will drop. Drop something else--
the something-else will end up under the boulder. Repeat. The second
boulder will be on top but the second something-else will be next in
the pile, above the first boulder. Now polymorph into a giant and pick
up the first boulder, then move away from that spot. Map will show
second something-else instead of the remaining boulder.
This fairly simple fix should work reliably on new games since boulders
will end up being consecutive on the top of piles. For old games,
boulders after the topmost could be anywhere and still yield a display
glitch, but since that's all the problem is (I hope...), we ought to
be able to live with that until old games eventually go away.
[A map display glitch doesn't explain a corrupted 'uball' so this fix
doesn't solve that.]
0ef58589f1