Fix for an extra axis inserted in eye function, when dimensionality is only [NS][NM][NO][ND].
This also fixes the index in the lib function of ns_mmq_2site_mq.
Task #7807 (https://gna.org/task/index.php?7807): Speed-up of dispersion models for Clustered analysis.
Authored by: tlinnet 2014-06-20
Parent: [r24192]
Child: [r24194]
