fixed some warnings

git-svn-id: http://libtorrent.googlecode.com/svn/trunk@9835 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda
expand buffer sizes for upnp error messages

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

git-svn-id: http://libtorrent.googlecode.com/svn/trunk@9839 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda
fix msvc-7.1 build

git-svn-id: http://libtorrent.googlecode.com/svn/trunk@9840 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda