Fixing unused variable warning

Simulation/ISF/ISF_FastCaloSim/ISF_FastCaloSimEvent/src/TFCSHistoLateralShapeParametrization.cxx

@@ -45,7 +45,7 @@ void TFCSHistoLateralShapeParametrization::set_number_of_hits(float nhits)
   m_nhits=nhits;
 }
 
-FCSReturnCode TFCSHistoLateralShapeParametrization::simulate_hit(Hit &hit, TFCSSimulationState &simulstate, const TFCSTruthState* truth, const TFCSExtrapolationState* extrapol)
+FCSReturnCode TFCSHistoLateralShapeParametrization::simulate_hit(Hit &hit, TFCSSimulationState &simulstate, const TFCSTruthState* truth, const TFCSExtrapolationState* /*extrapol*/)
 {
   if (!simulstate.randomEngine()) {
     return FCSFatal;