commit 560f9ca983d743cc42701c24546ac8c2080a13fe introduced a regression
in that a lot of variables got autovivificated
This results in a bug for some of them, at least for 'compssListLevel'

The solution is to store options values in a hash (which actually
simplifies here):
http://perldoc.perl.org/Getopt/Long.html#Storing-options-values-in-a-hash

Thanks Martin Whitaker for the suggestion

commit 560f9ca983d743cc42701c24546ac8c2080a13fe introduced this small
regression, which is important to fix for next commit, else
s/compsslistlevel/compssListLevel/ won't work as intended