[PATCH] app/dumpcap: don't pass negative value to strerror() on error

[Stephen Hemminger]

On Tue,  7 Feb 2023 09:00:50 -0800
Stephen Hemminger <stephen at networkplumber.org> wrote:

> If eth_stats_get fails (for example with -ENOTSUPP) then
> dumpcap would pass that to strerror which is incorrect.
> 
> Fixes: 8744f84bb255 ("app/dumpcap: add statistics mode")
> Coverity issue: 383136
> Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>

Small bug fix, please apply