use do { .. } while(0) around content of logging macros (#681)
use do { .. } while(0) around content of logging macros (#681)

Signed-off-by: Dirk Thomas <19795c8185177e940eedd30ceb2b716a54a3d5dc@users.noreply.github.com>
ros2/rclcpp,ros2/rclcpp