windows build fix for XP
windows build fix for XP

git-svn-id: 0f340b5413dfe41c73e779333638e6920713caeb@10245 a83610d8-ad2a-0410-a6ab-fc0612d85776

archos-sa/libtorrent-avp,archos-sa/libtorrent-avp,archos-sa/libtorrent-avp,archos-sa/libtorrent-avp,archos-sa/libtorrent-avp,archos-sa/libtorrent-avp