Fix JS error during vehicle removal when no feature is selected

 map.js

@@ -209,7 +209,7 @@
            if(vehicle.isDeleted) {
                if(vehicle_feature) {
                    vehicles_source.removeFeature(vehicle_feature);
                    if(feature_clicked.getId() == vehicle_feature.getId()) {
                    if(feature_clicked && feature_clicked.getId() == vehicle_feature.getId()) {
                        featureClicked();
                    }
                }