[HGSS] GetBattleMonItem function + Unnerve handling

u16 GetBattleMonItem(struct BattleStruct *sp, int client_no)
{
    if ((GetBattlerAbility(sp, client_no) == ABILITY_KLUTZ))
    {
        return 0;
    }
    if (sp->battlemon[client_no].moveeffect.embargo_count)
    {
        return 0;
    }
    // handle unnerve:  if an opposing pokemon has unnerve and the item it is holding is a berry, then no item will be read.
    if (((GetBattlerAbility(sp, BATTLER_OPPONENT(client_no)) == ABILITY_UNNERVE && sp->battlemon[BATTLER_OPPONENT(client_no)].hp != 0)
      || (GetBattlerAbility(sp, BATTLER_ACROSS(client_no)) == ABILITY_UNNERVE && sp->battlemon[BATTLER_ACROSS(client_no)].hp != 0))
     && (IS_ITEM_BERRY(sp->battlemon[client_no].item)))
    {
        return 0;
    }

    return sp->battlemon[client_no].item;
}