Implement modifications from #14432

Author: fchinu

Detectors/ITSMFT/ITS/tracking/src/Configuration.cxx

@@ -194,6 +194,7 @@ std::vector<TrackingParameters> TrackingMode::getTrackingParameters(TrackingMode
     p.DropTFUponFailure = tc.dropTFUponFailure;
     p.SaveTimeBenchmarks = tc.saveTimeBenchmarks;
     p.FataliseUponFailure = tc.fataliseUponFailure;
+    p.AllowSharingFirstCluster = tc.allowSharingFirstCluster;
 
     if (tc.useMatCorrTGeo) {
       p.CorrType = o2::base::PropagatorImpl<float>::MatCorrType::USEMatCorrTGeo;

Detectors/ITSMFT/ITS/tracking/src/TrackerTraits.cxx

@@ -941,9 +941,9 @@ void TrackerTraits<nLayers>::findRoads(const int iteration)
 
   for (int iROF{0}; iROF < mTimeFrame->getNrof(); ++iROF) {
     for (auto& track : mTimeFrame->getTracks(iROF)) {
-      int firstLayer{mTrkParams[0].NLayers}, firstCluster{constants::its::UnusedIndex};
+      int firstLayer{mTrkParams[0].NLayers}, firstCluster{constants::UnusedIndex};
       for (int iLayer{0}; iLayer < mTrkParams[0].NLayers; ++iLayer) {
-        if (track.getClusterIndex(iLayer) == constants::its::UnusedIndex) {
+        if (track.getClusterIndex(iLayer) == constants::UnusedIndex) {
           continue;
         }
         firstLayer = iLayer;