Copter/position_vector: remove const specifiers on objects returned by

value

ArduCopter/position_vector.pde

@@ -8,39 +8,39 @@
 //    .z = altitude above home in cm
 
 // pv_latlon_to_vector - convert lat/lon coordinates to a position vector
-const Vector3f pv_latlon_to_vector(int32_t lat, int32_t lon, int32_t alt)
+Vector3f pv_latlon_to_vector(int32_t lat, int32_t lon, int32_t alt)
 {
     Vector3f tmp((lat-home.lat) * LATLON_TO_CM, (lon-home.lng) * LATLON_TO_CM * scaleLongDown, alt);
     return tmp;
 }
 
 // pv_latlon_to_vector - convert lat/lon coordinates to a position vector
-const Vector3f pv_location_to_vector(Location loc)
+Vector3f pv_location_to_vector(Location loc)
 {
     Vector3f tmp((loc.lat-home.lat) * LATLON_TO_CM, (loc.lng-home.lng) * LATLON_TO_CM * scaleLongDown, loc.alt);
     return tmp;
 }
 
 // pv_get_lon - extract latitude from position vector
-const int32_t pv_get_lat(const Vector3f pos_vec)
+int32_t pv_get_lat(const Vector3f pos_vec)
 {
     return home.lat + (int32_t)(pos_vec.x / LATLON_TO_CM);
 }
 
 // pv_get_lon - extract longitude from position vector
-const int32_t pv_get_lon(const Vector3f &pos_vec)
+int32_t pv_get_lon(const Vector3f &pos_vec)
 {
     return home.lng + (int32_t)(pos_vec.y / LATLON_TO_CM * scaleLongUp);
 }
 
 // pv_get_horizontal_distance_cm - return distance between two positions in cm
-const float pv_get_horizontal_distance_cm(const Vector3f &origin, const Vector3f &destination)
+float pv_get_horizontal_distance_cm(const Vector3f &origin, const Vector3f &destination)
 {
     return pythagorous2(destination.x-origin.x,destination.y-origin.y);
 }
 
 // pv_get_bearing_cd - return bearing in centi-degrees between two positions
-const float pv_get_bearing_cd(const Vector3f &origin, const Vector3f &destination)
+float pv_get_bearing_cd(const Vector3f &origin, const Vector3f &destination)
 {
     float bearing = 9000 + atan2f(-(destination.x-origin.x), destination.y-origin.y) * DEGX100;
     if (bearing < 0) {