ITS: TF default arg

Author: f3sch

Detectors/ITSMFT/ITS/tracking/include/ITStracking/TimeFrame.h

@@ -306,7 +306,7 @@ struct TimeFrame {
   void wipe();
 
  private:
-  void prepareClusters(const TrackingParameters& trkParam, const int maxLayers);
+  void prepareClusters(const TrackingParameters& trkParam, const int maxLayers = nLayers);
   float mBz = 5.;
   unsigned int mNTotalLowPtVertices = 0;
   int mBeamPosWeight = 0;