message: Fix: avoid floating point exception
  If there are not enough particles left in the event after rebinning, we
  cannot compute the correlator. Add protection against this case,
  otherwise there will be a floating point exception, in this case we try
  to divide be zero.
diff: * File : AliAnalysisTaskAR.cxx
  * Author : Anton Riedel <anton.riedel@tum.de>
  * Date : 07.05.2021
  - * Last Modified Date: 27.11.2021
  + * Last Modified Date: 20.01.2022
  * Last Modified By : Anton Riedel <anton.riedel@tum.de>
  */
  @@ -2965,20 +2965,20 @@ void AliAnalysisTaskAR::FillFinalResultCorrelators() {
  // fill final result profiles
  Double_t corr = 0.0;
  - Double_t weight = 0.0;
  + Double_t weight = 1.0;
  for (Int_t kin = 0; kin < kKinematic; kin++) {
  for (std::size_t Bin = 0; Bin < fTrackBins[kin].size() - 1; Bin++) {
  CalculateQvectors(fKinematics[kin].at(Bin),
  fKinematicWeights[kin].at(Bin));
  corr = 0.;
  - weight = 0.;
  + weight = 1.;
  // loop over all correlators
  for (std::size_t i = 0; i < fCorrelators.size(); i++) {
  // protect against insufficient amount of statistics i.e. number of
  // particles is lower then the order of correlator due to track cuts
  - if (fKinematics[kin].at(Bin).size() < fCorrelators.at(i).size()) {
  + if (fKinematics[kin].at(Bin).size() <= fCorrelators.at(i).size()) {
  std::cout
  << "Not enough tracks in this event to compute the correlator"
  << std::endl
  