Audit rloc()

Most of the time, rloc() is used for teleporting monsters and it's not a
big deal if they can't find somewhere to go. In a few cases, it is. I
went through all the callsites and made calls to rloc() not cause
impossible()s if they don't need to.

Fixes a bug/suite of bugs reported by ais523.

src/apply.c

@@ -886,7 +886,7 @@ struct obj *obj;
         freeinv(obj);
         (void) mpickobj(mtmp, obj);
         if (!tele_restrict(mtmp))
-            (void) rloc(mtmp, FALSE);
+            (void) rloc(mtmp, TRUE);
     } else if (!is_unicorn(mtmp->data) && !humanoid(mtmp->data)
                && (!mtmp->minvis || perceives(mtmp->data)) && rn2(5)) {
         if (vis)