sensors: Add missing headers

src/modules/sensors/rc_update.cpp

@@ -39,13 +39,14 @@
 
 #include "rc_update.h"
 
+#include <string.h>
+#include <float.h>
+#include <errno.h>
+
 #include <uORB/uORB.h>
 #include <uORB/topics/actuator_controls.h>
 #include <uORB/topics/manual_control_setpoint.h>
 
-#include <string.h>
-#include <errno.h>
-
 using namespace sensors;
 
 RCUpdate::RCUpdate(const Parameters &parameters)