Tracker: init vehicle capabilities

AntennaTracker/Tracker.h

@@ -244,6 +244,7 @@ private:
     void tracking_manual_control(const mavlink_manual_control_t &msg);
     void update_armed_disarmed();
     void gcs_send_text_fmt(const prog_char_t *fmt, ...);
+    void init_capabilities(void);
 
 public:
     void mavlink_snoop(const mavlink_message_t* msg);

AntennaTracker/capabilities.cpp

@@ -0,0 +1,8 @@
+// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
+
+#include "Tracker.h"
+
+void Tracker::init_capabilities(void)
+{
+    hal.util->set_capabilities(MAV_PROTOCOL_CAPABILITY_PARAM_FLOAT);
+}

AntennaTracker/system.cpp

@@ -102,6 +102,8 @@ void Tracker::init_tracker()
         get_home_eeprom(current_loc);
     }
 
+    init_capabilities();
+
     gcs_send_text_P(SEVERITY_LOW,PSTR("\nReady to track."));
     hal.scheduler->delay(1000); // Why????