FwPositionControl: don't do takeoff help for vtol

- takeoff help is used for fixed wings, it increases the altitude setpoint
after a launch. A vtol does not need this as it's already sufficiently
high up in the air.

Signed-off-by: Roman <bapstroman@gmail.com>

src/modules/fw_pos_control_l1/FixedwingPositionControl.cpp

@@ -678,6 +678,11 @@ FixedwingPositionControl::in_takeoff_situation()
 void
 FixedwingPositionControl::do_takeoff_help(float *hold_altitude, float *pitch_limit_min)
 {
+	// vtol does not need takeoff help
+	if (_vehicle_status.is_vtol) {
+		return;
+	}
+
 	/* demand "climbout_diff" m above ground if user switched into this mode during takeoff */
 	if (in_takeoff_situation()) {
 		*hold_altitude = _takeoff_ground_alt + _parameters.climbout_diff;