Title: df: Fixed error if dynamic levels should be set
Level: 1
Component: checks
Class: fix
Compatible: compat
Edition: cre
State: unknown
Version: 1.2.8p26
Date: 1505220682

Since 1.2.8 no dynamic levels could be set anymore. The error "You need to
specify levels for filesystems larger than 0 bytes." prevented the user from
saving a rule if a filesystem has not 0 bytes. Thix has been fixed now.
