message: Protection against Qtot<0: reject such TPC clusters
diff: @@ -1564,6 +1564,7 @@ Int_t AliTPCclusterer::ReadHLTClusters()
  // check if the charge is above the required minimum
  if (maxCharge<minMaxCutAbs) keepCluster = false;
  + if (cluster->GetQ() < 0) keepCluster = false;
  if (maxCharge<minMaxCutSigma*noise) keepCluster = false;
  }
  if (!keepCluster) {
  