AR_WPNav: make get_stopping_location public

libraries/AR_WPNav/AR_WPNav.h

@@ -81,6 +81,10 @@ public:
     float get_overshoot() const { return _overshoot; }
     float get_pivot_rate() const { return _pivot_rate; }
 
+    // calculate stopping location using current position and attitude controller provided maximum deceleration
+    // returns true on success, false on failure
+    bool get_stopping_location(Location& stopping_loc) WARN_IF_UNUSED;
+
     // parameter var table
     static const struct AP_Param::GroupInfo var_info[];
 
@@ -101,10 +105,6 @@ private:
     // have been updated: _wp_bearing_cd, _cross_track_error, _distance_to_destination
     void update_desired_speed(float dt);
 
-    // calculate stopping location using current position and attitude controller provided maximum deceleration
-    // returns true on success, false on failure
-    bool get_stopping_location(Location& stopping_loc) WARN_IF_UNUSED;
-
     // returns true if vehicle should pivot turn at next waypoint
     bool use_pivot_steering_at_next_WP(float yaw_error_cd) const;