Structured data stronger undefined check (#1522)

Author: Alessandro100

web-app/package.json

@@ -1,6 +1,6 @@
 {
   "name": "mobility-database",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "private": true,
   "dependencies": {
     "@emotion/react": "^11.13.0",

web-app/src/app/screens/Feed/StructuredData.functions.ts

@@ -251,8 +251,8 @@ export default function generateFeedStructuredData(
   // For gtfs rt
   relatedFeeds?: AllFeedType[],
   relatedGtfsFeeds?: GTFSFeedType[],
-): StructureDataInterface {
-  let structuredData: StructureDataInterface = {};
+): StructureDataInterface | undefined {
+  let structuredData: StructureDataInterface | undefined;
   if (feed?.data_type === 'gtfs') {
     structuredData = getGtfsStructuredData(feed as GTFSFeedType, description);
   } else if (feed?.data_type === 'gbfs') {