Merge pull request #30 from mauropasse/mauro/spin-no-args-support

Add spin_some default arg

Author: iRobot ROS

rclcpp/include/rclcpp/executors/events_executor.hpp

@@ -84,7 +84,7 @@ class EventsExecutor : public rclcpp::Executor
    */
   RCLCPP_PUBLIC
   void
-  spin_some(std::chrono::nanoseconds max_duration) override;
+  spin_some(std::chrono::nanoseconds max_duration = std::chrono::nanoseconds(0)) override;
 
   RCLCPP_PUBLIC
   void