It's just a small typo:
require/wol/WakeOnLan.php returns true so the following is working
ms_computer.php
//Wake On Lan function
if ($wol->wol_send == $l->g(true)) {
msg_info( $l->g(1282).$wol->wol_send . "=>" . $wol_item->MACADDR . "/" . $wol_item->IPADDRESS);
} else {
msg_error($l->g(1282).$wol->wol_send . "=>" . $wol_item->MACADDR . "/" . $wol_item->IPADDRESS);
}
instead of
if ($wol->wol_send == $l->g(1282)) {
msg_info($wol->wol_send . "=>" . $wol_item->MACADDR . "/" . $wol_item->IPADDRESS);
} else {
msg_error($wol->wol_send . "=>" . $wol_item->MACADDR . "/" . $wol_item->IPADDRESS);
}