mon_pmname(), obj_pmname()

Revive some code from 5 or so years ago that's been sitting in a
defunct local git branch.  There are a couple of references to
figurines having gender; the old, unfinished code did already have
support for that, the current code doesn't.  It probably won't take
much effort to add it in but I want to get this first part out of
the way.

Replace some of the
pmname(mon->data, Mgender[mon]) calls with simpler
mon_pmname(mon) and some
pmname(&mons[statue->corpsenm],
   (statue->spe & CORPSTAT_GENDER) == ... ? ... : ...) with simpler
obj_pmname(obj).  There are other instances of them which haven't
been changed but could be.

src/zap.c

@@ -1052,8 +1052,7 @@ unturn_dead(struct monst *mon)
                 pline("%s%s suddenly %s%s%s!", owner, corpse,
                       nonliving(mtmp2->data) ? "reanimates" : "comes alive",
                       different_type ? " as " : "",
-                      different_type ? an(pmname(mtmp2->data, Mgender(mtmp2)))
-                                     : "");
+                      different_type ? an(mon_pmname(mtmp2)) : "");
             else if (canseemon(mtmp2))
                 pline("%s suddenly appears!", Amonnam(mtmp2));
         } else {