energy

Hi,

For safety use, it's better to have null check for all variables which are used in this function.

if (!_sessionPriv.$clientAlarmList) {
    return;
}

↓

if (!_sessionPriv.$clientAlarmList
     || !_sessionPriv.$monitoredItemForAlarmList
     || !_sessionPriv.$subscriptionforAlarmList ) {
    return;
}

https://github.com/node-opcua/node-opcua/blob/master/pack

Bug description

Scaphandre doesn't provide selinux module to be granted, so scaphandre is not supposed able to reach /proc files

To Reproduce

Run podman scaphandre on a CentOS node with Selinux permissive or enforced.

Expected behavior

```type=PROCTITLE` msg=audit(1620219205.083:466054): proctitle=2F7573722F6C6F63616C2F62696E2F7363617068616E6472650070726F6D657468657573
typ