Fix frontend error when car is not moving yet

components/control_center/src/app/component/landing/landing.component.ts

@@ -55,6 +55,9 @@ export class LandingComponent implements OnInit {
         startWith(0),
         switchMap(() => this.restService.getCarEvents(vin))
       ).subscribe((data: any) => {
+          if (data.body === '') {
+            return;
+          }
           const carEvent = data.body as CarEvent;
           const car = this.car_markers.get(vin) as Car;
           car.carEvent = carEvent;