Preparation to simplify the review. parse_mountinfo() assumes that:

1. The "err:" block does all the necessary cleanups on failure.

   This is wrong, see the next patch.

2. We can never skip the mountpoint.

   This is true, but we are going to change this.

s/goto err/goto end/ in the main loop, add the "end:" label which inserts
the new mount_info into the list and then checks ret != 0 to figure out
whether we need to abort.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>