Fix of bug where self.relax.data.select_sim was treated as a list
See bug #5977 and followup discussion on the relax_devel list: https://gna.org/bugs/?func=detailitem&item_id=5977 https://mail.gna.org/public/relax-devel/2006-05/msg00007.html
Authored by: macraild 2006-05-31
Parent: [r2504]
Child: [r2506]
