fixed some warnings

git-svn-id: http://libtorrent.googlecode.com/svn@9835 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda
tag 0.16.16 release

git-svn-id: http://libtorrent.googlecode.com/svn@9836 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda
expand buffer sizes for upnp error messages

git-svn-id: http://libtorrent.googlecode.com/svn@9837 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda
expand buffer sizes for upnp error messages

git-svn-id: http://libtorrent.googlecode.com/svn@9838 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda