fix issue with empty allegro order id

Author: cieslix

Observer/SaveShippingAfterObserver.php

@@ -90,7 +90,7 @@ public function execute(Observer $observer)
             return;
         }
 
-        $orderId = $order->getExtensionAttributes()->getExternalId();
+        $orderId = $order->getExternalId() ?: $order->getExtensionAttributes()->getExternalId();
 
         $shipmentData = ['lineItems' => []];
         foreach ($shipment->getItems() as $item) {

Observer/SaveShippingBeforeObserver.php

@@ -69,7 +69,7 @@ public function execute(Observer $observer)
                 return;
             }
 
-            $orderId = $order->getExtensionAttributes()->getExternalId();
+            $orderId = $order->getExternalId() ?: $order->getExtensionAttributes()->getExternalId();
 
             try {