message: use consistently the SPD vertex
diff: @@ -871,8 +871,6 @@ void AliAnalysisTaskDiffCrossSections::UserExec(Option_t *)
  fTreeData.fFMDInfo.Fill(esdEvent, fFMDMultLowCut);
  fTreeData.fADInfo.FillAD(esdEvent, fTriggerAnalysis);
  - fTreeData.fVtxInfo.Fill(esdEvent->GetPrimaryVertexSPD());
  -
  fFastOrMap = mult->GetFastOrFiredChips();
  fFiredChipMap = mult->GetFiredChipMap();
  @@ -883,7 +881,9 @@ void AliAnalysisTaskDiffCrossSections::UserExec(Option_t *)
  if (fIsMC)
  fMCInfo.Fill(MCEvent(), fMCType);
  - const AliESDVertex *esdVertex = esdEvent->GetPrimaryVertex();
  + const AliESDVertex *esdVertex = esdEvent->GetPrimaryVertexSPD();
  + fTreeData.fVtxInfo.Fill(esdVertex);
  +
  TVector3 vertexPosition(esdVertex->GetX(),
  esdVertex->GetY(),
  esdVertex->GetZ());
  