Moved the "eta_scale = 2.0**(-3.0/2.0)" out of lib function for mmq cr72, since this is only needs to be computed once.
Task #7807 (https://gna.org/task/index.php?7807): Speed-up of dispersion models for Clustered analysis.
Authored by: tlinnet 2014-06-18
Parent: [r24141]
Child: [r24143]
