Fling is only working for items with flingPower equal to 0

[AsparagusEduardo]

To fix:

bool32 CanFling(u8 battlerId)
{
    u16 item = gBattleMons[battlerId].item;
    u16 itemEffect = ItemId_GetHoldEffect(item);

    if (item == ITEM_NONE
      #if B_KLUTZ_FLING_INTERACTION >= GEN_5
      || GetBattlerAbility(battlerId) == ABILITY_KLUTZ
      #endif
      || gFieldStatuses & STATUS_FIELD_MAGIC_ROOM
      || gDisableStructs[battlerId].embargoTimer != 0
-      || GetFlingPowerFromItemId(item) != 0
+      || GetFlingPowerFromItemId(item) == 0
      || !CanBattlerGetOrLoseItem(battlerId, item))
        return FALSE;

    return TRUE;
}

[AsparagusEduardo]

#2408