fix build

Author: HovorunBh

nav2_costmap_2d/include/nav2_costmap_2d/layer.hpp

@@ -184,6 +184,9 @@ class Layer
 
   // Names of the parameters declared on the ROS node
   std::unordered_set<std::string> local_params_;
+
+private:
+  std::vector<geometry_msgs::msg::Point> footprint_spec_;
 };
 
 }  // namespace nav2_costmap_2d