ghoul fodder (trunk only)

ghoul fodder (trunk only)

     I doubt if many players in nethack ever have pet ghouls (in slash'em
they're the necromancer's starting pet), but if so, provide them with a
portable food source by letting ghouls eat dead eggs in addition to tainted
corpses.  Also, let them eat fresher varieties of either when they're about
to starve to death.  Treat lizard & lichen corpses as always fresh since
they never become tainted (probably ruining slash'em necromancers' present
pet food of choice, though they'll still be able to eat lizard corspes if
starving).

     I set the omnivore flag in their monster definition.  Previously they
had been left as non-eaters despite the fact that they need to eat.  When
the flag wasn't set, a hero who poly'd into one and then put on an amulet of
unchanging could go a very long time (thousands of turns) before the hunger
imposed by wearing an amulet finally made him/her become hungry.  (Same as
with any other truely non-eating monster, so not really a big deal.)

     Also, avoid the expression &mons[obj->corpsenm] for objects where the
corpsenm field isn't applicable, in case the default value ever changes from
0 (PM_GIANT_ANT) to NON_PM (-1).