Corrected an error where 'spin.relax_data' was accidentally changed to 'spin.relax_spin'.
This was pointed by Edward d'Auvergne in a post at:
https://mail.gna.org/public/relax-devel/2008-01/msg00060.html (Message-id:
<7f080ed10801152356j14ab4049r4d60eb6bc9521249@...>)
