B01001 fix: corpse grammar

<Someone> wrote:
> You start bashing monsters with your 2 cockatrice corpses.
> You hit the foo with the cockatrice corpse (note singular).
> The foo is slowing down. The foo turns to stone.
> Also: Your cockatrice corpses rots away.

It appears that vtense() has a problem recognizing "corpses"
as plural.  This doesn't fix that, it just switches to using
otense() in this particular case.

doc/fixes34.3

@@ -85,6 +85,7 @@ try even harder to avoid incorrect map display while changing levels
 no "freaked" message by exploding black light, unless you really are
 sleeping monster could respond to attacks by other monsters
 sleeping shopkeeper responds to various events without waking
+rotting corpses grammar fix
 
 
 Platform- and/or Interface-Specific Fixes

src/dig.c

@@ -1538,7 +1538,7 @@ long timeout;	/* unused */
 		char *cname = corpse_xname(obj, FALSE);
 		Your("%s%s %s away%c",
 		     obj == uwep ? "wielded " : nul, cname,
-		     vtense(cname, "rot"), obj == uwep ? '!' : '.');
+		     otense(obj, "rot"), obj == uwep ? '!' : '.');
 	    }
 	    if (obj == uwep) {
 		uwepgone();	/* now bare handed */

src/uhitm.c

@@ -739,11 +739,13 @@ int thrown;
 #endif
 		    case CORPSE:		/* fixed by polder@cs.vu.nl */
 			if (touch_petrifies(&mons[obj->corpsenm])) {
+			    static const char withwhat[] = "corpse";
 			    tmp = 1;
 			    hittxt = TRUE;
-			    You("hit %s with %s corpse.", mon_nam(mon),
+			    You("hit %s with %s %s.", mon_nam(mon),
 				obj->dknown ? the(mons[obj->corpsenm].mname) :
-				an(mons[obj->corpsenm].mname));
+				an(mons[obj->corpsenm].mname),
+				(obj->quan > 1) ? makeplural(withwhat) : withwhat);
 			    if (!munstone(mon, TRUE))
 				minstapetrify(mon, TRUE);
 			    if (resists_ston(mon)) break;