Regression in the http-client

[William Candillon]

The following query:
import module namespace http = "http://expath.org/ns/http-client";

let $res := http:send-request((), "http://www.yahoo.com/")[2]
for $e in $res//*
order by local-name($e)
return $e

works on zorba 2.1.0 but fails in the trunk