Registration Bug with potential fix

[bmartin13]

Running r1605 in docker from this docker image:
https://hub.docker.com/r/linuxserver/projectsend

Found a bug when registering with a new user... error thrown:

Fatal error: Uncaught Error: Undefined constant "ProjectSend\Classes\CURRENT_USER_LEVEL" in /app/www/public/includes/Classes/Users.php:842

Stack trace:
#0 /app/www/public/includes/Classes/Users.php(464): ProjectSend\Classes\Users->limitUploadToSave()
#1 /app/www/public/register.php(44): ProjectSend\Classes\Users->create()
#2 {main} thrown in /app/www/public/includes/Classes/Users.php on line 842

PROPOSED FIX on line 842 of /app/www/public/includes/Classes/Users.php

current:
if (CURRENT_USER_LEVEL == 7) {
return;
}
proposed:
if (!defined('CURRENT_USER_LEVEL') or CURRENT_USER_LEVEL == 7) {
return;
}

[serg499]

Thank you! Also have the same bug and @bmartin13 solution seems working. I was finally able to see "Registration successful" instead of a blank screen. Thank you!