message: Fix PID in tracking plot
  Change TH2 to TProfile, otherwise there will be problems when merging
  the output.
diff: #include <TChain.h>
  #include <TF1.h>
  #include <TSpline.h>
  +#include <TProfile2D.h>
  #include <AliAnalysisManager.h>
  #include <AliInputEventHandler.h>
  @@ -731,9 +732,8 @@ void AliAnalysisTaskPIDqa::FillTPCHistogramsSignal(TList *sublist, Int_t scenari
  // ---| Basic case |--------------------------------------------------------
  else {
  // printf(" PID %d\n", pidInTracking);
  - TH2 *hPIDtracking = (TH2*)sublist->At(offsetPIDtracking);
  - const Int_t bin=hPIDtracking->FindBin(mom, sigStd);
  - hPIDtracking->SetBinContent(bin, Double_t(pidInTracking+1));
  + TProfile2D *hPIDtracking = (TProfile2D*)sublist->At(offsetPIDtracking);
  + hPIDtracking->Fill(mom, sigStd, Double_t(pidInTracking+1));
  TH2 *hPIDtrackingTrackedAs = (TH2*)sublist->At(offsetPIDtracking + 1 + pidInTracking);
  hPIDtrackingTrackedAs->Fill(mom, sigStd);
  @@ -2617,7 +2617,7 @@ void AliAnalysisTaskPIDqa::AddTPCHistogramsSignal(TList *sublist, const char *sc
  else {
  // basic case
  {
  - TH2F *hSigP = new TH2F("hSigP_TPC_PIDinTracking",
  + TProfile2D *hSigP = new TProfile2D("hSigP_TPC_PIDinTracking",
  "TPC signal vs. p vs. PID in tracking (AliPID::EParticleType + 1);p (GeV/c); TPC signal (arb. units); PID in tracking (AliPID::EParticleType + 1)",
  vX->GetNrows()-1,vX->GetMatrixArray(),
  binsSignal, 0, signalMax);
  