This adds a further throttle to chain summoning. Monsters can only summon
spellcasting nasties if the nasties are lower level than the summoner, which
makes infinite chains impossible (as long as the player figures out which
monster to kill first).
Implement Pat's suggestion of setting the mavenge flag when a covetous
monster flees, since they may subsequently teleport back and attack even
if mflee is set.
When the Wizard uses STRAT_MONSTR to get next to any monster
which is carrying the Amulet, he was actually displacing the other
monster to take its map location. It was possible--and still is,
actually, although it takes a lot longer now--for the excessive
summoning by spell casting monsters to entirely fill up the temple
on the Sanctum level, so the Wizard would sometimes knock Moloch's
high priest right out of his temple. And since that priest doesn't
turn hostile until you enter the temple, you might have needed to
kill a peaceful human in order to get the Amulet.
Now when there's no elbow room in the temple, the Wizard will
stay outside instead of bumping the high priest out.
This fixes the problem with my monster spell changes which let monsters
summon monsters around you when they don't even know you're around.
The summoned monsters should appear where the monster thinks you are, if
you're invisible or displaced.
I have not prevented them from summoning monsters when you are in a temple,
nor have I prevented them from aggravating monsters several times when you're
out of sight.
Messages should be a little smarter, taking into account number of monsters
and invisibility/displacement.
--Ken A
