//This function "cooks" a track label. If label<0, this track is fake.
//--------------------------------------------------------------------
Int_t noc=t->GetNumberOfClusters();
+ if (noc<1) return;
Int_t *lb=new Int_t[noc];
Int_t *mx=new Int_t[noc];
AliCluster **clusters=new AliCluster*[noc];