fixed issue where file::set_size would update the file modification date even when the size was not changed (fixes #105)
fixed issue where file::set_size would update the file modification date even when the size was not changed (fixes #105)

git-svn-id: a9fe57c6430a6997a38eed96ede4af2f77d6b776@1449 a83610d8-ad2a-0410-a6ab-fc0612d85776

chongyc/libtorrent,chongyc/libtorrent,chongyc/libtorrent,chongyc/libtorrent