fix bug in peer_connection::second_tick

git-svn-id: svn://svn.code.sf.net/p/libtorrent/code@10313 a83610d8-ad2a-0410-a6ab-fc0612d85776
fix bug in delay-load feature of torrents

git-svn-id: svn://svn.code.sf.net/p/libtorrent/code@10314 a83610d8-ad2a-0410-a6ab-fc0612d85776