Reported yesterday as issue #1207 by elunna and over four years ago
in #H9430: monsters in gas clouds that should be shown by Warning
aren't. And in some discussion of #H9430 back then: monsters
adjacent to the hero while in gas clouds aren't shown on the map,
but combat and other interaction describes them as if they were.
There have been changes since then--to prevent seeing things on the
far side of gas clouds as if there were no clouds in the way--but
the basic problems with warning and adjacency weren't addressed.
This is a band-aid (tm) that probably makes things livable. Don't
allow gas region display to override monsters that are sensed via
warning or when the hero is next to them. That part doesn't work
correctly if the hero isn't blind and is inside the cloud while the
monster is adjacent but outside. I think it will take more than a
band-aid to deal with that sensibly.
Closes#1207
fd5526db7c