[LTP] [PATCH v4 2/7] tst_net.sh: Declare prefix variable as empty

[Cyril Hrubis]

Hi!
It starts to look like it would be easier to write a shell just for LTP
and stick to it :-).

Anyways:

Reviewed-by: Cyril Hrubis <chrubis@suse.cz>

-- 
Cyril Hrubis
chrubis@suse.cz