APM: when land_complete is true, use land_pitch

this gives a flare on final landing

ArduPlane/ArduPlane.pde

@@ -1080,13 +1080,11 @@ static void update_current_flight_mode(void)
 			case MAV_CMD_NAV_LAND:
 				calc_nav_roll();
 
-				if (airspeed.use()) {
+                calc_nav_pitch();
-					calc_nav_pitch();
+                calc_throttle();
-					calc_throttle();
+				if (!airspeed.use() || land_complete) {
-				}else{
+                    // hold pitch constant in final approach
-					calc_nav_pitch();               // calculate nav_pitch just to use for calc_throttle
+					nav_pitch_cd = g.land_pitch_cd; 
-					calc_throttle();                // throttle based on altitude error
-					nav_pitch_cd = g.land_pitch_cd; // pitch held constant
 				}
 
 				if (land_complete) {
@@ -1100,6 +1098,7 @@ static void update_current_flight_mode(void)
                 // we are doing normal AUTO flight, the special cases
                 // are for takeoff and landing
 				hold_course = -1;
+                land_complete = false;
 				calc_nav_roll();
 				calc_nav_pitch();
 				calc_throttle();

ArduPlane/commands_logic.pde

@@ -8,6 +8,7 @@ handle_process_nav_cmd()
 {
 	// reset navigation integrators
 	// -------------------------
+    land_complete = false;
 	reset_I();
 
 		gcs_send_text_fmt(PSTR("Executing command ID #%i"),next_nav_command.id);
@@ -319,9 +320,9 @@ static bool verify_land()
 	if (((wp_distance > 0) && (wp_distance <= (2*g_gps->ground_speed/100)))
 		|| (current_loc.alt <= next_WP.alt + 300)){
 
-		land_complete = 1;
+		land_complete = true;
 
-		if(hold_course == -1) {
+		if (hold_course == -1) {
             // we have just reached the threshold of 2 seconds or 3
 			// meters to landing. We now don't want to do any radical
 			// turns, as rolling could put the wings into the runway.