Only log error if error is not None
Only log error if error is not None

Probably this code silently failed until now, when it started to emit logged errors of type
`ErrorException: E_NOTICE: Trying to access array offset on value of type null in /www/data/Physik.FSPHYS/php_include/init.php:120`.
fsphys-muenster/homepage-php,fsphys-muenster/homepage-php,fsphys-muenster/homepage-php,fsphys-muenster/homepage-php,fsphys-muenster/homepage-php