message: Different method to fill the impact parameter info
diff: @@ -68,9 +68,8 @@ AliNanoAODTrack::AliNanoAODTrack(AliAODTrack * aodTrack, const char * vars) :
  AllocateInternalStorage(AliNanoAODTrackMapping::GetInstance()->GetSize(), AliNanoAODTrackMapping::GetInstance()->GetSizeInt());
  // Get DCA correctly (covers both kases with and without kIsDCA bit set)
  - Float_t dcaXY = 0;
  - Float_t dcaZ = 0;
  - aodTrack->GetImpactParameters(dcaXY, dcaZ);
  + float dca[2]{0.f,0.f},cov[3]{0.f,0.f,0.f};
  + aodTrack->GetImpactParameters(dca, cov);
  // fill content
  if (AliNanoAODTrackMapping::GetInstance()->GetPt() != -1) SetVar(AliNanoAODTrackMapping::GetInstance()->GetPt() , aodTrack->Pt() );
  @@ -82,11 +81,11 @@ AliNanoAODTrack::AliNanoAODTrack(AliAODTrack * aodTrack, const char * vars) :
  if (AliNanoAODTrackMapping::GetInstance()->GetPosZ() != -1) SetVar(AliNanoAODTrackMapping::GetInstance()->GetPosZ() , position[2] );
  if (AliNanoAODTrackMapping::GetInstance()->GetPosDCAx() != -1) SetVar(AliNanoAODTrackMapping::GetInstance()->GetPosDCAx() , aodTrack->XAtDCA() );
  if (AliNanoAODTrackMapping::GetInstance()->GetPosDCAy() != -1) SetVar(AliNanoAODTrackMapping::GetInstance()->GetPosDCAy() , aodTrack->YAtDCA() );
  - if (AliNanoAODTrackMapping::GetInstance()->GetPosDCAz() != -1) SetVar(AliNanoAODTrackMapping::GetInstance()->GetPosDCAz() , dcaZ );
  + if (AliNanoAODTrackMapping::GetInstance()->GetPosDCAz() != -1) SetVar(AliNanoAODTrackMapping::GetInstance()->GetPosDCAz() , dca[1] );
  if (AliNanoAODTrackMapping::GetInstance()->GetPDCAX() != -1) SetVar(AliNanoAODTrackMapping::GetInstance()->GetPDCAX() , aodTrack->PxAtDCA() );
  if (AliNanoAODTrackMapping::GetInstance()->GetPDCAY() != -1) SetVar(AliNanoAODTrackMapping::GetInstance()->GetPDCAY() , aodTrack->PyAtDCA() );
  if (AliNanoAODTrackMapping::GetInstance()->GetPDCAZ() != -1) SetVar(AliNanoAODTrackMapping::GetInstance()->GetPDCAZ() , aodTrack->PzAtDCA() );
  - if (AliNanoAODTrackMapping::GetInstance()->GetDCA() != -1) SetVar(AliNanoAODTrackMapping::GetInstance()->GetDCA() , dcaXY );
  + if (AliNanoAODTrackMapping::GetInstance()->GetDCA() != -1) SetVar(AliNanoAODTrackMapping::GetInstance()->GetDCA() , dca[0] );
  if (AliNanoAODTrackMapping::GetInstance()->GetRAtAbsorberEnd() != -1) SetVar(AliNanoAODTrackMapping::GetInstance()->GetRAtAbsorberEnd() , aodTrack->GetRAtAbsorberEnd() );
  if (AliNanoAODTrackMapping::GetInstance()->GetTPCncls() != -1) SetVarInt(AliNanoAODTrackMapping::GetInstance()->GetTPCncls() , aodTrack->GetTPCNcls() );
  if (AliNanoAODTrackMapping::GetInstance()->GetID() != -1) SetVar(AliNanoAODTrackMapping::GetInstance()->GetID() , aodTrack->GetID() );
  