back-ported an iterator-debug fix from libtorrent_aio
back-ported an iterator-debug fix from libtorrent_aio

aindigo/rasterbar_libtorrent,aindigo/rasterbar_libtorrent,aindigo/rasterbar_libtorrent,aindigo/rasterbar_libtorrent,aindigo/rasterbar_libtorrent,aindigo/rasterbar_libtorrent