Fixed supplierbilllinegrid to not load empty consignment documents

prs.desktop/Panels/Suppliers/Bills/SupplierBillLineGrid.cs

@@ -370,7 +370,7 @@ public class SupplierBillLineGrid : DynamicOneToManyGrid<Bill, BillLine>
         if (dlg.ShowDialog() == true)
         {
             var imports = dlg.Data();
-            var consids = imports.ExtractValues<PurchaseOrderItem, Guid>(x => x.Consignment.ID).Distinct().ToArray();
+            var consids = imports.ExtractValues<PurchaseOrderItem, Guid>(x => x.Consignment.ID).Where(x => x != Guid.Empty).Distinct().ToArray();
 
             var results = Client.QueryMultiple(
                 new KeyedQueryDef<Consignment>(