Hotfix for plotSFit and runSFit_new scripts
The scripts failed if certain command line options are omitted. This should be fixed (in a hacky way) for now.
IMHO In the long term, the runSFit_new and plotSFit scripts should handle non-simfits and simfits the same way, internally. The workspace of the nonsim fit should more or less look like a simfit with only one category. This could prevent many if-else checks.