ct_enter(): don't leak opened fd

Also, don't clog ret variable, use a separate one for return code of
container_add_task().

Addition to commit 821b22e

Reported by Coverity, CID 996835

Cc: Glauber Costa <glommer@openvz.org>
Signed-off-by: Kir Kolyshkin <kir@openvz.org>
1 file changed