//constructor setting also fSignalExpanded
AliITSdigitSDD( Float_t phys,const Int_t *digits,const Int_t *tracks,
const Int_t *hits,const Float_t *charges, Int_t sige);
//constructor setting also fSignalExpanded
AliITSdigitSDD( Float_t phys,const Int_t *digits,const Int_t *tracks,
const Int_t *hits,const Float_t *charges, Int_t sige);