MAGETWO-91501: Invoice and Shipping PDF does not show Size 0 for child product

- Add check for shipment label value

Author: YuliyaLabudova

app/code/Magento/Sales/Model/Order/Pdf/Items/Shipment/DefaultShipment.php

@@ -89,7 +89,7 @@ public function draw()
                 ];
 
                 // draw options value
-                if ($option['value']) {
+                if ($option['value'] !== null) {
                     $printValue = isset(
                         $option['print_value']
                     ) ? $option['print_value'] : $this->filterManager->stripTags(