Fix: fix compiler warnings

Author: ariedel-cern

Detectors/TPC/qc/include/TPCQC/GPUErrorQA.h

@@ -54,15 +54,15 @@ class GPUErrorQA
   void resetHistograms();
 
   /// return histograms
-  const std::unordered_map<std::string, std::unique_ptr<TH1>>& getMapHist() const { return mMapHist; };
+  const std::unordered_map<std::string, std::unique_ptr<TH1>>& getMapHist() const { return mMapHist; }
 
   /// Dump results to a file
   void dumpToFile(std::string filename);
 
  private:
   std::unordered_map<std::string, std::unique_ptr<TH1>> mMapHist;
 
-  ClassDefNV(GPUErrorQA, 1);
+  ClassDefNV(GPUErrorQA, 2);
 };
 } // namespace o2::tpc::qc
 

Detectors/TPC/qc/src/GPUErrorQA.cxx

@@ -68,7 +68,7 @@ void GPUErrorQA::dumpToFile(const std::string filename)
   auto f = std::unique_ptr<TFile>(TFile::Open(filename.data(), "recreate"));
   TObjArray arr;
   arr.SetName("GPUErrorQA_Hists");
-  for (const auto& [name, hist] : mMapHist) {
+  for ([[maybe_unused]] const auto& [name, hist] : mMapHist) {
     arr.Add(hist.get());
   }
   arr.Write(arr.GetName(), TObject::kSingleKey);