add class member

Signed-off-by: Davide Faconti <[email protected]>

nav2_amcl/include/nav2_amcl/amcl_node.hpp

@@ -392,6 +392,7 @@ class AmclNode : public nav2_util::LifecycleNode
   double z_rand_;
   std::string scan_topic_{"scan"};
   std::string map_topic_{"map"};
+  bool freespace_downsampling_ = false;
 };
 
 }  // namespace nav2_amcl