level drain while polymorphed (trunk only)

Noticed when incorporating the "vampire dancing" patch:  losing a level
while polymorphed would subtract from your normal hit points but didn't
affect your monster hit points.  Now they'll lose d8 from max and current,
similar to the amount they increase when gaining a level.

     This also addresses an issue from the newsgroup a few weeks back:
someone mentioned an assumption that Stormbringer drained an amount other
than d8 for monsters who use some other formula for their hit points.  It
wasn't true, but now it will be (approximately).  Most monsters with unusual
hit points aren't subject to level drain, so it shouldn't have much impact.

doc/fixes35.0

@@ -86,6 +86,8 @@ various actions--such as enchanting--performed on an unpaid shop object
 adjust health threshold where wounded hero will be healed by successful prayer
 prevent lose-level+regain-level cycle from arbritrarily boosting HP and Pw
 prevent polymorphing into "new man" at low level from magnifying HP and Pw
+losing a level while polymorphed affects hero's current monster HP as well as
+	underlying normal HP
 
 
 Platform- and/or Interface-Specific Fixes