fix: ignore null-island location

Closes #149

src/app/modules/map/page/map-page.component.ts

@@ -448,12 +448,15 @@ export class MapPageComponent {
    * Show a single place
    */
   async showItemModal(item: SCPlace) {
-    const placeWithoutGeo = {...item, geo: undefined};
+    const placeWithNullLocation = {
+      ...item,
+      geo: {point: {coordinates: [0, 0]}},
+    };
     this.modal = await this.modalController.create({
       component: MapSingleModalComponent,
       swipeToClose: true,
       componentProps: {
-        item: placeWithoutGeo,
+        item: placeWithNullLocation,
         dismissAction: () => {
           this.modal.dismiss();
         },