Error when scanDirectories contains a directory that does not exist.

[martinssipenko]

In case a configuration file is used with an entry in scanDirectories that points to a directory that does not exist an error is returned.

I believe this happens because relpath returns false after which DIRECTORY_SEPARATOR is appended here:

unused-scanner/Lib/Config.php

Line 39 in 11a4788

return realpath(rtrim($path, DIRECTORY_SEPARATOR)) . DIRECTORY_SEPARATOR;

It should append the DIRECTORY_SEPARATOR to the output of rtrim(), not realpath(). Further, there should also be a check or filter to exclude directories that don't exist (cases when realpath() returns false).