If the Wizard fled up the stairs on level 1 and escaped the dungeon
(which can only happen if he isn't carrying the Amulet or any of
the invocation items), the number_of_wizards counter wasn't being
decremented. If that was the only Wizard, he couldn't be brought
back into play because he wasn't on the migrating monsters list, and
he wouldn't appear on the Plane of Earth when the hero eventually
went there. If that was one of two, the remaining one couldn't use
Double Trouble anymore. (I'm not sure about Earth handling in that
situation; should be moot now.)
Wizard mode blessed genocide of "*" when the Wizard is on current
level caused the same problem.
Fix by keeping the number_of_wizards counter up to date if mongone()
is called for the Wizard, handling both cases. Also, don't let the
Wizard escape the dungeon unless he's one of two at the time, making
the first case no longer possible.
If wizard mode blessed genocide of "*" is used on the level where
the quest nemesis is present, the killed-the-nemesis feedback will
now be given. I'm not completely convinced that this was the right
thing to do, but it only applies to wizard mode so may not matter.
Fixes#372
12498ffa44