Includes the following commons:
    hec_par.inc
   
hec_evth.inc
   
hec_geo.inc
   
hec_his_sys.inc
   
hec_online.inc
   
hec_ped.inc
   
hec_ped_sys.inc
 
This routine vzeros the depth counts, pion-, elctron-, and physics trigger counts.
    Then 
the cubic fit package is initialized with a call to:
    hec_cub.f
 
    And finally
the histograms from the previous run are deleted.