Update airspeed topic to use message generation

msg/airspeed.msg

@@ -0,0 +1,4 @@
+uint64 timestamp			# microseconds since system boot, needed to integrate
+float32 indicated_airspeed_m_s		# indicated airspeed in meters per second, -1 if unknown
+float32 true_airspeed_m_s		# true airspeed in meters per second, -1 if unknown
+float32 air_temperature_celsius		# air temperature in degrees celsius, -1000 if unknown

src/modules/uORB/topics/airspeed.h

@@ -1,6 +1,6 @@
 /****************************************************************************
  *
- *   Copyright (C) 2012-2013 PX4 Development Team. All rights reserved.
+ *   Copyright (C) 2013-2015 PX4 Development Team. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -31,31 +31,37 @@
  *
  ****************************************************************************/
 
-/**
- * @file airspeed.h
- *
- * Definition of airspeed topic
- */
+/* Auto-generated by genmsg_cpp from file /Users/lorenzmeier/src/Firmware/msg/airspeed.msg */
 
-#ifndef TOPIC_AIRSPEED_H_
-#define TOPIC_AIRSPEED_H_
 
-#include <platforms/px4_defines.h>
+#pragma once
+
 #include <stdint.h>
+#include <uORB/uORB.h>
+
+
+#ifndef __cplusplus
+
+#endif
 
 /**
  * @addtogroup topics
  * @{
  */
 
-/**
- * Airspeed
- */
+
+#ifdef __cplusplus
+struct __EXPORT airspeed_s {
+#else
 struct airspeed_s {
-	uint64_t	timestamp;			/**< microseconds since system boot, needed to integrate */
-	float		indicated_airspeed_m_s;		/**< indicated airspeed in meters per second, -1 if unknown	 */
-	float		true_airspeed_m_s;		/**< true airspeed in meters per second, -1 if unknown */
-	float		air_temperature_celsius;	/**< air temperature in degrees celsius, -1000 if unknown */
+#endif
+	uint64_t timestamp;
+	float indicated_airspeed_m_s;
+	float true_airspeed_m_s;
+	float air_temperature_celsius;
+#ifdef __cplusplus
+
+#endif
 };
 
 /**
@@ -64,5 +70,3 @@ struct airspeed_s {
 
 /* register this as object request broker structure */
 ORB_DECLARE(airspeed);
-
-#endif