expand test_checking to make sure we can check incomplete files
expand test_checking to make sure we can check incomplete files

git-svn-id: 1f8b9e27a0d9fdc3c34835ba27e4b04c490a2e66@10434 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda

steeve/libtorrent,steeve/libtorrent,steeve/libtorrent,steeve/libtorrent,steeve/libtorrent,steeve/libtorrent