[PWGDQ] Add protections when getting mcCollision assigned to collision (#9041)

Author: sigurdnese

PWGDQ/TableProducer/tableMakerMC_withAssoc.cxx

@@ -476,7 +476,9 @@ struct TableMakerMC {
       VarManager::ResetValues(0, VarManager::kNEventWiseVariables);
       VarManager::FillBC(bc);
       VarManager::FillEvent<TEventFillMap>(collision); // extract event information and place it in the fValues array
-      VarManager::FillEvent<VarManager::ObjTypes::CollisionMC>(collision.mcCollision());
+      if (collision.has_mcCollision()) {
+        VarManager::FillEvent<VarManager::ObjTypes::CollisionMC>(collision.mcCollision());
+      }
       if (fDoDetailedQA) {
         fHistMan->FillHistClass("Event_BeforeCuts", VarManager::fgValues);
       }

PWGDQ/Tasks/dqEfficiency_withAssoc.cxx

@@ -217,7 +217,9 @@ struct AnalysisEventSelection {
       // Reset the fValues array and fill event observables
       VarManager::ResetValues(0, VarManager::kNEventWiseVariables);
       VarManager::FillEvent<TEventFillMap>(event);
-      VarManager::FillEvent<VarManager::ObjTypes::ReducedEventMC>(event.reducedMCevent());
+      if (event.has_reducedMCevent()) {
+        VarManager::FillEvent<VarManager::ObjTypes::ReducedEventMC>(event.reducedMCevent());
+      }
 
       bool decision = false;
       // if QA is requested fill histograms before event selections