fix B13006 - Unchanging-poly self-genocide

<Someone> reported that killing yourself by picking your current
monster class as the target of a blessed scroll of genocide while
polymorphed and wearing an amulet of unchanging would result in
"killed by genocide" rather than "killed by a scroll of genocide".
That wasn't the only problem here; it also ended the game right away,
before genociding the rest of the class of monsters; that could affect
the contents of a resulting bones level.

     Also, the 3.3.0 race/class split resulted in getting the message
"you feel dead inside" twice if you were a human or elf character who
genocides '@' while polymorphed into some non-@ form.

doc/fixes34.1

@@ -266,6 +266,10 @@ removing a ring might relearn what it is after amnesia
 sleeping shopkeeper shouldn't talk to digging player
 give more specific feedback when dipping unicorn horns into potions
 can see self via infravision or ESP or monster detection when invisible
+class genocide that killed polymorphed self while `Unchanging' reported
+	incomplete cause of death and possibly left rest of class in bones
+class genocide of @ by human or elf character polymorphed into non-@ gave
+	"you feel dead inside" message twice
 
 
 Platform- and/or Interface-Specific Fixes