bdrv_co_getlength() should be used in coroutine context. Replace
bdrv_getlength() by bdrv_co_getlength() in parallels_check_outside_image().
Signed-off-by: Alexander Ivanov <alexander.ivanov@virtuozzo.com> Reviewed-by: Denis V. Lunev <den@openvz.org> Signed-off-by: Denis V. Lunev <den@openvz.org>