match function def to impl

Author: KA7E

vpr/src/pack/re_cluster_util.h

@@ -89,7 +89,7 @@ bool start_new_cluster_for_mol(t_pack_molecule* molecule,
                                t_lb_router_data** router_data,
                                PartitionRegion& temp_cluster_pr,
                                NocGroupId& temp_cluster_noc_grp_id,
-                               const int detailed_routing_stage = 1);
+                               const int& detailed_routing_stage = 1);
 
 /**
  * @brief A function that packs a molecule into an existing cluster
@@ -109,7 +109,7 @@ bool pack_mol_in_existing_cluster(t_pack_molecule* molecule,
                                   bool during_packing,
                                   t_clustering_data& clustering_data,
                                   t_lb_router_data*& router_data,
-                                  const int detailed_routing_stage = 1);
+                                  const int& detailed_routing_stage = 1);
 
 /**
  * @brief A function that fix the clustered netlist if the move is performed