commands_logic: Added check to make sure the do_approach method is not being used to land.

ArduCopter/commands_logic.pde

@@ -294,6 +294,8 @@ static void do_land()
 
 static void do_approach()
 {
+	// Make sure we are not using this to land
+	if(g.rtl_approach_alt > 5){
 		wp_control = LOITER_MODE;
 
 		// just to make sure
@@ -311,6 +313,9 @@ static void do_approach()
 
 		// Set target alt based on user setting
 		set_new_altitude(g.rtl_approach_alt * 100);
+	} else {
+		set_mode(LOITER);
+	}
 }
 
 static void do_loiter_unlimited()