Change the monster constants to match the current position of the switch
statement. Also test canseemon(), since the message isn't needed if you
see the change. I didn't make any other change to the message frequency.
If it's too frequent, then perhaps the changes themselves are too frequent.
Forwarded from the newsgroup: when a monster gets hit by wand or
spell of polymorph, any armor that fell off was protected from being
hit by that same zap, but a dropped weapon wasn't. Nor was the whole
dropped inventory in the case where the monster is killed by system
shock rather than transformed. Protect its entire inventory.
