dcathandler.GetPackagesForProductAsync() returning System.NullReference if product is null (fix in description)

When we  query a package and its product is null but not products property then get packages throws exception.
Following code can be used to fix the issue


 if (dcathandler.ProductListing.Product == null)
                    dcathandler.ProductListing.Product = dcathandler.ProductListing.Products[0];
                var g = await dcathandler.GetPackagesForProductAsync();