get rid of ugly cast

src/battle_anim_effects_2.c

@@ -3470,7 +3470,7 @@ void AnimOrbitFast(struct Sprite *sprite)
 
 static void AnimOrbitFastStep(struct Sprite *sprite)
 {
-    if ((u16)(sprite->data[1] - 64) < 128)
+    if (sprite->data[1] >= 64 && sprite->data[1] <= 191)
         sprite->subpriority = sprite->data[7] + 1;
     else
         sprite->subpriority = sprite->data[7] - 1;