fix: Print Invalid Index only if map not empty in UpdateRestaurantStatus()

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/FoodDeliveryController.cpp

@@ -282,7 +282,7 @@ void FoodDeliveryController::updateRestaurantStatus() const
 			listRestaurants();
 			std::cout << "Updated Restaurant " << restaurantIterator->second->getName() << " successfully\n";
 		}
-		else
+		else if (!restaurantOwner.getRestaurants().empty())
 		{
 			std::cout << "Invalid Index. Cannot update Restaurant status!\n";
 			return;