Remove unused headers and add default case to switch

Author: Yuanjun Mei

PWGCF/MultiparticleCorrelations/Tasks/multiparticleCorrelationsMei.cxx

@@ -29,7 +29,6 @@
 #include <Framework/runDataProcessing.h>
 
 #include <TCollection.h>
-#include <TColor.h>
 #include <TFile.h>
 #include <TGrid.h>
 #include <TH1.h>
@@ -38,7 +37,6 @@
 #include <TList.h>
 #include <TObject.h>
 #include <TString.h>
-#include <TStyle.h>
 #include <TSystem.h>
 
 #include <Rtypes.h>
@@ -133,7 +131,7 @@ struct MultiparticleCorrelationsMei // this name is used in lower-case format to
                              OutputObjSourceType::OutputObjSource};
 
   // *) CCDB:
-  Service<ccdb::BasicCCDBManager> ccdb; // support for offline callibration data base, not needed for the time being...
+  Service<ccdb::BasicCCDBManager> ccdb{}; // support for offline callibration data base, not needed for the time being...
 
   // *) Define configurables:
   Configurable<int> centralityEstimator{"centralityEstimator", 0, "centrality estimator: 0=FT0C, 1=FT0M, 2=FV0A, 3=NTPV"};
@@ -241,7 +239,7 @@ struct MultiparticleCorrelationsMei // this name is used in lower-case format to
       }
     } // while(objectIter = next())
 
-    return NULL;
+    return nullptr;
   } // TObject* getObjectFromList(TList *list, char *objectName)
 
   TH1D* getHistogramWithWeights(const char* filePath, const char* runNumber)
@@ -416,6 +414,9 @@ struct MultiparticleCorrelationsMei // this name is used in lower-case format to
       case ENTPV:
         thisCent = collision.centNTPV();
         break;
+      default:
+        LOG(warning) << "Unknown centrality estimator. Using FT0C as default.";
+        break; // thisCent is already FT0C
     }
 
     auto thisRefMult = collision.multTPC(); // use auto to determine the type
@@ -435,6 +436,9 @@ struct MultiparticleCorrelationsMei // this name is used in lower-case format to
       case EMultNTracksPV:
         thisRefMult = collision.multNTracksPV();
         break;
+      default:
+        LOG(warning) << "Unknown multiplicity. Using multTPC as default.";
+        break; // thisRefMult is already multTPC
     }
 
     if constexpr (rs == ERec || rs == ERecAndSim) {
@@ -569,6 +573,9 @@ struct MultiparticleCorrelationsMei // this name is used in lower-case format to
       case ENTPV:
         thisCent = collision.centNTPV();
         break;
+      default:
+        LOG(warning) << "Unknown centrality estimator. Using FT0C as default.";
+        break; // thisCent is already FT0C
     }
     if constexpr (rs == ERecAndSim || rs == ESim) {
       if (!collision.has_mcCollision()) {