fix darwin clang build

git-svn-id: http://libtorrent.googlecode.com/svn@9913 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda
extend lazy_bdecode unit test

git-svn-id: http://libtorrent.googlecode.com/svn@9914 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda