Fix checkPermission problem

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| 1.4 PR        | I think a 1.4PR is necessary but I cannot test it at the moment.
| Refs tickets  | -
| License       | LGPLv3+
| Doc PR        | -

This little patch fixes the call SecurityUtil::checkPermission($component, $instance, $level, $user != 0) for the case the user is NOT logged in. It used always the rules for unregistered users.