Bug report

Required Info:

• Operating System: Ubuntu 20.04
• ROS2 Version: Galactic
• Version or commit hash: last galactic sync
• DDS implementation: Cyclone

Steps to reproduce issue

Call CostmapLayer::clearArea
https://github.com/ros-planning/navigation2/blob/b201d058a7b15f1786c57afe69d079ac5d502018/nav2_costmap_2d/src/costmap_layer.cpp#L64-L81

Expected behavior

https://github.com/ros-planning/navigation2/blob/b201d058a7b15f1786c57afe69d079ac5d502018/nav2_costmap_2d/include/nav2_costmap_2d/costmap_layer.hpp#L78-L81

Actual behavior

The opposite!

Additional information

Propably this line should have == instead of !=
https://github.com/ros-planning/navigation2/blob/b201d058a7b15f1786c57afe69d079ac5d502018/nav2_costmap_2d/src/costmap_layer.cpp#L72