Fixes for 2 model-free system tests for a new system which again shows optimisation differences :S
The results are from Tiago Pais <tpais att itqb dott unl dott pt> (Message-id:
<BA08C06336CE4466990EBAFB59D7DFCF@...>,
https://mail.gna.org/public/relax-users/2011-01/msg00029.html.
