From a06f8a156d1471ee7ebf6daa745b02e6bdb918d6 Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <tridge@samba.org>
Date: Mon, 19 Aug 2013 21:12:41 +1000
Subject: [PATCH] Copter: fixed PX4 build

---
 ArduCopter/Log.pde | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ArduCopter/Log.pde b/ArduCopter/Log.pde
index bb545a4b3f..08a7001bed 100644
--- a/ArduCopter/Log.pde
+++ b/ArduCopter/Log.pde
@@ -335,7 +335,7 @@ static void Log_Write_Control_Tuning()
         sonar_alt           : sonar_alt,
         baro_alt            : baro_alt,
         next_wp_alt         : get_target_alt_for_reporting() / 100.0f,
-        desired_sonar_alt   : target_sonar_alt,
+        desired_sonar_alt   : (int16_t)target_sonar_alt,
         angle_boost         : angle_boost,
         climb_rate          : climb_rate,
         throttle_out        : g.rc_3.servo_out,