Delete User's images after a certain time as well

[DarkTexas 🦄]

Hi!

I've changed according to this answer by @Rodolfo (THREAD) I have changed my app/lib/classes/class.image.php to:

    public static function getAvailableExpirations()
    {
        $string = _s('After %n %t');
        $translate = [ // Just for gettext parsing
            'minute' => _n('minute', 'minutes', 1),
            'hour'    => _n('hour', 'hours', 1),
            'day'        => _n('day', 'days', 1),
            'week'    => _n('week', 'weeks', 1),
            'month'    => _n('month', 'months', 1),
            'year'    => _n('year', 'years', 1),
        ];
        $table = [
            ['day', 3],
            ['day', 7],
            ['month', 1],
        ];
        foreach ($table as $expire) {
            $unit = $expire[0];
            $interval_spec = 'P' . (in_array($unit, ['second', 'minute', 'hour']) ? 'T' : null) . $expire[1] . strtoupper($unit[0]);
            $return[$interval_spec] = strtr($string, ['%n' => $expire[1], '%t' => _n($unit, $unit . 's', $expire[1])]);
        }
        return $return;
    }

However, when a User does register themself and uploads a image the expire time (for the upload, checked via PHPMyAdmin) is set to NULL unless the user goes into their settings and hits "Save", where all 3 options are available. Without changing anything but pressing "Save" the next upload does have a expire time.

Is that a bug or do I need to do something else?