Rope golems may death drop grappling hooks

doc/fixes3-7-0.txt

@@ -837,7 +837,7 @@ if a lit potion of oil on the floor was launched by an explosion and it hit
 	it could trigger an "obj_is_local" panic when end of game cleanup
 	tried to extinguish it as a light source
 place_object() validated coordinates after using them to index level.objects
-killed rope golem may drop leashes and bullwhips
+killed rope golem may drop leashes, bullwhips, and grappling hooks
 using magic portals stuns hero for a few turns
 using level teleporters confuses hero without teleport control for a few turns
 clear obj->bypass for buried objects [a giant on ice triggers a fire trap,

src/mon.c

@@ -667,7 +667,9 @@ make_corpse(struct monst *mtmp, unsigned int corpseflags)
     case PM_ROPE_GOLEM:
         num = rn2(3);
         while (num-- > 0) {
-            obj = mksobj_at(rn2(2) ? LEASH : BULLWHIP, x, y, TRUE, FALSE);
+            obj = mksobj_at(rn2(2) ? LEASH
+                            : rn2(3) ? BULLWHIP : GRAPPLING_HOOK,
+                            x, y, TRUE, FALSE);
         }
         free_mgivenname(mtmp);
         break;