Fix intermittent "undefined" error
Fix intermittent "undefined" error

erikquinn/atc,glangford/atc,glangford/atc,deepkw/deepkw.github.io,tedrek/atc,ghariman/atc,erikquinn/atc,culebron/atc,harp71/atc,deepkw/deepkw.github.io,culebron/atc,tedrek/atc,harp71/atc,jpeterson1346/atc,luznicky/atc,MaicomMR/Brazil-Airport,harp71/atc,MaicomMR/Brazil-Airport,luznicky/atc,jpeterson1346/atc,ghariman/atc,erikquinn/atc,jpeterson1346/atc,ghariman/atc,luznicky/atc,tedrek/atc,deepkw/deepkw.github.io