if (gtv_last != null) {
int state = (int) flight_series.value_after(AltosFlightSeries.state_name, gtv_last.time);
if (state == AltosLib.ao_flight_landed)
if (gtv_last != null) {
int state = (int) flight_series.value_after(AltosFlightSeries.state_name, gtv_last.time);
if (state == AltosLib.ao_flight_landed)