Fixes#133
Monsters who lost an amulet of life saving while having their life
saved wouldn't attempt to put on another amulet unless/until they
picked up some object. Likewise if they had a worn item stolen.
(There are probably other events which should re-check worn gear.)
The suggested commit had a life-saved monster re-check equipment
during life-saving which might have led to reports about them
effectively getting extra moves, especially if two-weapon fighting
or zap rebound with sequence of kill/life-save/kill-again allowed
the target to put on a replacement amulet of life-saving prior to
the second kill. It also wasn't amenable to dealing with stolen
equipment. This alternate fix sets a flag to have monster check
its equipment on its next move.
2c231f57bd