MensaplanPanel: Fixed handling of empty plans

src/panels/Mensaplan/MensaplanPanel.tsx

@@ -52,7 +52,7 @@ const MensaplanPanel = (props: {definition: MensaPanelDefinition}) => {
       // Request the API
       const request = await fetch(`https://infoscreen.oh14.de/canteen-menu/v3/canteens/${props.definition.canteenId}/${fetchFor}`);
 
-      if(!request.ok) {
+      if(!(request.status === 200)) {
         menus.current = [];
         specials.current = [];
         return;