FT0 DigitQcTask: hotfix for chID per BC plot (#1876)

Author: afurs

Modules/FIT/FT0/src/DigitQcTask.cxx

@@ -434,6 +434,7 @@ void DigitQcTask::startOfActivity(const Activity& activity)
   mHistPmTcmAverageTimeC->Reset();
   mHistTriggersSw->Reset();
   mHistTriggersSoftwareVsTCM->Reset();
+  mHistChIDperBC->Reset();
   for (auto& entry : mMapHistAmp1D) {
     entry.second->Reset();
   }
@@ -786,6 +787,7 @@ void DigitQcTask::reset()
   mHistPmTcmAverageTimeC->Reset();
   mHistTriggersSw->Reset();
   mHistTriggersSoftwareVsTCM->Reset();
+  mHistChIDperBC->Reset();
   for (auto& entry : mMapHistAmp1D) {
     entry.second->Reset();
   }