Match object description via single function

making the code more readable.

Instead of doing strcmp(OBJ_DESCR(objects[otyp]), "foo"),
just call objdescr_is(obj, "foo")

(via xNetHack)

src/eat.c

@@ -2134,7 +2134,7 @@ eatspecial()
             pline("Yuck%c", otmp->blessed ? '!' : '.');
         else if (otmp->oclass == SCROLL_CLASS
                  /* check description after checking for specific scrolls */
-                 && !strcmpi(OBJ_DESCR(objects[otmp->otyp]), "YUM YUM"))
+                 && objdescr_is(otmp, "YUM YUM"))
             pline("Yum%c", otmp->blessed ? '!' : '.');
         else
             pline("Needs salt...");