fixed bug in disk IO thread which would make it sometimes0 exit the thread if an error occurred
fixed bug in disk IO thread which would make it sometimes0 exit the thread if an error occurred

git-svn-id: 6ed3528c1be4534134272ad6dd050eeaa1f628d3@2993 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda

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