attempted msvc-10.0 build fix

git-svn-id: http://libtorrent.googlecode.com/svn/trunk@10553 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda
merge changes from RC_1_0

git-svn-id: http://libtorrent.googlecode.com/svn/trunk@10554 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda