Fix build on GCC 4.4.
Fix build on GCC 4.4.

hamedramzi/libtorrent,hamedramzi/libtorrent,TeoTwawki/libtorrent,snowyu/libtorrent,hamedramzi/libtorrent,hamedramzi/libtorrent,snowyu/libtorrent,snowyu/libtorrent,snowyu/libtorrent,hamedramzi/libtorrent,TeoTwawki/libtorrent,TeoTwawki/libtorrent,TeoTwawki/libtorrent,hamedramzi/libtorrent,TeoTwawki/libtorrent,snowyu/libtorrent,snowyu/libtorrent,TeoTwawki/libtorrent