Check correct variable for null

The wrong variable is being checked for null, which can cause a null reference exception

Author: dennisvanderweide

InventoryCatalog/Model/ResourceModel/BulkInventoryTransfer.php

@@ -127,7 +127,7 @@ private function transferInventory(
 
         if ($orgSourceItem !== null) {
             $status = (int) $orgSourceItem[SourceItemInterface::STATUS];
-        } elseif ($dstSourceItemQty !== null) {
+        } elseif ($dstSourceItem !== null) {
             $status = (int) $dstSourceItem[SourceItemInterface::STATUS];
         } else {
             $status = (int) SourceItemInterface::STATUS_OUT_OF_STOCK;