From 4430f7534464b0c7721b71313eab593345713e77 Mon Sep 17 00:00:00 2001
From: Adam M Rivera <a432511@gmail.com>
Date: Thu, 19 Apr 2012 10:21:04 -0500
Subject: [PATCH] navigation.pde: Put the new calc_GPS_velocity method in a
 compiler if that checks the new RETRO_LOITER_MODE config value (saves space
 and ensures its not being used unless retro loiter mode is enabled)

---
 ArduCopter/navigation.pde | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/ArduCopter/navigation.pde b/ArduCopter/navigation.pde
index 2ccb3b0762..47648eb429 100644
--- a/ArduCopter/navigation.pde
+++ b/ArduCopter/navigation.pde
@@ -90,12 +90,14 @@ static void calc_XY_velocity(){
 	last_latitude 	= g_gps->latitude;
 }
 
+#if RETRO_LOITER_MODE == ENABLED
 static void calc_GPS_velocity()
 {
 	float temp = radians((float)g_gps->ground_course/100.0);
 	x_actual_speed = (float)g_gps->ground_speed * sin(temp);
 	y_actual_speed = (float)g_gps->ground_speed * cos(temp);
 }
+#endif
 
 static void calc_location_error(struct Location *next_loc)
 {