Fix for commit 23246.
http://svn.gna.org/viewcvs/relax?view=revision&revision=23246
The testing taking a value to a power was performed wrong.
This made systemtest Relax_disp.test_hansen_cpmg_data_auto_analysis_numeric not working.
Authored by: tlinnet 2014-05-20
Parent: [r23267]
Child: [r23269]
