More usage of ST_OAM constants and SPRITE macros

src/shop.c

@@ -439,7 +439,7 @@ static void CB2_InitBuyMenu(void)
     {
     case 0:
         SetVBlankHBlankCallbacksToNull();
-        CpuFastFill(0, (void *)OAM, 0x400);
+        CpuFastFill(0, (void *)OAM, OAM_SIZE);
         ScanlineEffect_Stop();
         reset_temp_tile_data_buffers();
         FreeAllSpritePalettes();
@@ -856,7 +856,7 @@ static void BuyMenuDrawEventObjects(void)
         if (BuyMenuCheckIfEventObjectOverlapsMenuBg(gShopDataPtr->viewportObjects[i]) == TRUE)
         {
             gSprites[spriteId].subspriteTableNum = 4;
-            gSprites[spriteId].subspriteMode = 1;
+            gSprites[spriteId].subspriteMode = SUBSPRITES_ON;
         }
 
         StartSpriteAnim(&gSprites[spriteId], gShopDataPtr->viewportObjects[i][ANIM_NUM]);