commit ea5f4db8 upstream.

"mem" is type u8.  We need parenthesis here or it screws up the pointer
math probably leading to an oops.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Willy Tarreau <w@1wt.eu>