message: fixed Qn initialisation when ZDC is not calibrated
diff: @@ -278,22 +278,22 @@ void AliAnalysisTaskV1SingleMu::UserExec ( Option_t * /*option*/ )
  // // Flow info
  // //
  AliFlowVector vQarray[2];
  - Double_t QA[2]={-2.-2};
  - Double_t QB[2]={-2.-2};
  + Double_t QA[2]={0.,0.};
  + Double_t QB[2]={0.,0.};
  // get ZDC Q-vectors
  AliFlowEvent* anEvent = dynamic_cast<AliFlowEvent*>(GetInputData(1));
  if(anEvent) {
  // Get Q vectors for the subevents
  anEvent->GetZDC2Qsub(vQarray);
  - } else {
  - AliWarning("WARNING: FlowEvent not found !!! \n");
  - }
  QA[0] = vQarray[0].X(); // ZNA
  QA[1] = vQarray[0].Y(); // ZNA
  QB[0] = vQarray[1].X(); // ZNC
  QB[1] = vQarray[1].Y(); // ZNC
  + } else {
  + AliWarning("WARNING: FlowEvent not found !!! \n");
  + }
  - if( (QA[0]*QA[0]+QA[1]*QA[1])==0.) {
  + if( (QA[0]*QA[0]+QA[1]*QA[1])<10.E-6) {
  AliWarning("WARNING : FlowEvent did not compute the flow vectors for ZDC");
  return;
  }
  