ip a flush: unnecessarily chatty when there's nothing to flush

ip a flush: unnecessarily chatty when there's nothing to flush

On tis, 2008-07-22 at 20:21 +0200, martin f krafft wrote:
> piper:~|master|% sudo ip a flush dev eth0 >/dev/null
> Nothing to flush.
>
> It should just shut up, shouldn't it? :)

The patch below makes the "Nothing to flush" only visible when show
statistics flag is given, and then only to stdout rather then stderr.

$ sudo ./ip/ip -s addr flush dev skif
Nothing to flush.
$ sudo ./ip/ip addr flush dev skif
$

(See http://bugs.debian.org/492196 )