add 'ExtractHeader' method to object storage return types
diff --git a/openstack/objectstorage/v1/objects/requests.go b/openstack/objectstorage/v1/objects/requests.go
index f5ca296..56004b2 100644
--- a/openstack/objectstorage/v1/objects/requests.go
+++ b/openstack/objectstorage/v1/objects/requests.go
@@ -303,11 +303,12 @@
 		url += query
 	}
 
-	_, res.Err = perigee.Request("DELETE", url, perigee.Options{
+	resp, err := perigee.Request("DELETE", url, perigee.Options{
 		MoreHeaders: c.AuthenticatedHeaders(),
 		OkCodes:     []int{204},
 	})
-
+	res.Header = resp.HttpResponse.Header
+	res.Err = err
 	return res
 }