fixup! front: add start and destination icons in the scenario map

Author: theocrsb

front/src/modules/simulationResult/components/SimulationResultsMap/RenderItinerary.tsx

@@ -23,13 +23,13 @@ export default function RenderItinerary(props: RenderItineraryProps) {
     'line-color': '#158DCF',
   };
 
-  const startCoordinate = geojsonPath.geometry.coordinates[0];
-  const endCoordinate =
-    geojsonPath.geometry.coordinates[geojsonPath.geometry.coordinates.length - 1];
+  // We know we have a geometry so we have at least 2 coordinates
+  const [startLongitude, startLatitude] = geojsonPath.geometry.coordinates.at(0)!;
+  const [endLongitude, endLatitude] = geojsonPath.geometry.coordinates.at(-1)!;
 
   return (
     <Source type="geojson" data={geojsonPath}>
-      <Marker longitude={startCoordinate[0]} latitude={startCoordinate[1]} anchor="bottom">
+      <Marker longitude={startLongitude} latitude={startLatitude} anchor="bottom">
         <img src={originIcon} alt="origin" />
       </Marker>
       <OrderedLayer
@@ -40,7 +40,7 @@ export default function RenderItinerary(props: RenderItineraryProps) {
         layerOrder={layerOrder}
       />
       <OrderedLayer id="geojsonPathLine" type="line" paint={paintLine} layerOrder={layerOrder} />
-      <Marker longitude={endCoordinate[0]} latitude={endCoordinate[1]} anchor="bottom">
+      <Marker longitude={endLongitude} latitude={endLatitude} anchor="bottom">
         <img src={destinationIcon} alt="destination" />
       </Marker>
     </Source>