bugs bugs bugs

[Olly Betts]

OK, a quick round-up of a few bugs I've found:

0.97 release:

* The new "*entrance" is broken.  It check that its argument is a survey
  name (it should check it's a station name).

* aven: if there's a problem during initialisation (lack of memory, missing
  support file, etc), an empty messagebox is popped up (a wxWindows bug).

Both of these are fixed in the 0.98 prerelease.

0.98 prerelease 1:

* [Pre-386 DOS version]: caverot: doesn't respond to keyboard (I was trying
  an alternative way to read keystrokes, but it's no good).

* There seems to be a problem with the symmetric matrix code which results
  in the occasional loop exploding - I'm investigating at the moment.

Cheers,
Olly