parse_csv a little more robust now, for files that have a separator at the end of the line

git-svn-id: http://observium.org/svn/observer/trunk@4173 61d68cd4-352d-0410-923a-c4978735b2b8
fix previous commit, now not breaking when column is empty

git-svn-id: http://observium.org/svn/observer/trunk@4174 61d68cd4-352d-0410-923a-c4978735b2b8