fix github issue #531 - genderless corpses

Dead monsters that had traits saved with the corpse would revive as
the same gender, but ordinary corpses revived with random gender so
could be different from before they got killed.

Since corpses of monsters lacked gender, those for monsters with
gender-specific names were described by the neuter name.

This is a fairly big change for a fairly minor problem and needs a
lot more testing.

Fixes #531

doc/fixes37.0

@@ -541,6 +541,7 @@ change valkyrie and warrior (valk quest) monsters from chaotic to lawful
 change attendant (healer quest) monster from lawful to neutral
 quit is not longer bound to M-q
 change default value of autopickup to off and color to on
+resurrected corpse of mon could end up with different gender from original mon
 
 
 Fixes to 3.7.0-x Problems that Were Exposed Via git Repository
@@ -710,6 +711,8 @@ stair revamp unintentionally resulted in cursed potion of levitation no longer
 	causing hero to hit head on ceiling
 enlightenment/disclosure when wielding two weapons with two-weap skill higher
 	than secondary weapon's skill had "with" duplicated in the feedback
+corpse of monster with gender specific names (king vs queen and so forth)
+	was always described by the neutral name (ruler and such)
 
 curses: 'msg_window' option wasn't functional for curses unless the binary
 	also included tty support