changed to lvalue ref

Author: lenaploetzke

cpp/models/ide_secir/model.cpp

@@ -323,8 +323,8 @@ void Model::update_compartments()
 }
 
 void Model::update_compartment_from_flow(InfectionState infectionState,
-                                         std::vector<InfectionTransition> const&& IncomingFlows,
-                                         std::vector<InfectionTransition> const&& OutgoingFlows)
+                                         std::vector<InfectionTransition> const& IncomingFlows,
+                                         std::vector<InfectionTransition> const& OutgoingFlows)
 {
     Eigen::Index num_time_points   = m_populations.get_num_time_points();
     ScalarType updated_compartment = m_populations[num_time_points - 2][Eigen::Index(infectionState)];

cpp/models/ide_secir/model.h

@@ -269,8 +269,8 @@ class Model
      * Therefore the flows of the current time step should be calculated before using this function.
      */
     void update_compartment_from_flow(InfectionState infectionState,
-                                      std::vector<InfectionTransition> const&& IncomingFlows,
-                                      std::vector<InfectionTransition> const&& OutgoingFlows);
+                                      std::vector<InfectionTransition> const& IncomingFlows,
+                                      std::vector<InfectionTransition> const& OutgoingFlows);
 
     // ---- Private parameters. ----
     ScalarType m_forceofinfection{0}; ///< Force of infection term needed for numerical scheme.