merged change from RC_1_0

git-svn-id: http://libtorrent.googlecode.com/svn/trunk@10148 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda
fix build and suppress offsetof warnings in backwards-compatibility code

git-svn-id: http://libtorrent.googlecode.com/svn/trunk@10149 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda
merged fix from RC_1_0

git-svn-id: http://libtorrent.googlecode.com/svn/trunk@10151 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda
merged change from RC_1_0

git-svn-id: http://libtorrent.googlecode.com/svn/trunk@10153 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda