Cut case MAVLINK_MSG_ID_LANDING_TARGET content and paste into handle_message_landing_target() method.

src/modules/simulator/simulator.h

@@ -331,6 +331,8 @@ private:
 	mavlink_hil_actuator_controls_t actuator_controls_from_outputs(const actuator_outputs_s &actuators);
 
 	void handle_message(mavlink_message_t *msg, bool publish);
+	void handle_message_landing_target(const mavlink_message_t *msg);
+
 	void parameters_update(bool force);
 	void poll_topics();
 	void pollForMAVLinkMessages(bool publish);