[misc] Fixed possible error when no features are returned in the JSON
[misc] Fixed possible error when no features are returned in the JSON

mjshepherd/patient-network,phenotips/patient-network,veronikaslc/patient-network,veronikaslc/patient-network,mjshepherd/patient-network,phenotips/patient-network,phenotips/patient-network,phenotips/patient-network,mjshepherd/patient-network