added 'firsttime' for bzero() in the ::run member function -- BGG 12/27/2009
added 'firsttime' for bzero() in the ::run member function -- BGG 12/27/2009

RTcmix/RTcmix,RTcmix/RTcmix,RTcmix/RTcmix,RTcmix/RTcmix,RTcmix/RTcmix,RTcmix/RTcmix