Fix for structure cleaning and value replacing for model mmq CR72.
System test: test_korzhnev_2005_all_data revealed how this should be done properly.
Task #7807 (https://gna.org/task/index.php?7807): Speed-up of dispersion models for Clustered analysis.
Authored by: tlinnet 2014-06-17
Parent: [r24021]
Child: [r24023]
