Cykotitan

function isHeldShield(cid)
    local t = {getPlayerSlotItem(cid, CONST_SLOT_RIGHT).itemid, getPlayerSlotItem(cid, CONST_SLOT_LEFT).itemid}

    return (t[1] ~= 0 and getItemInfo(t[1]).weaponType == WEAPON_SHIELD)
        or (t[2] ~= 0 and getItemInfo(t[2]).weaponType == WEAPON_SHIELD)
end