The function parse_port_list() is designed to return
unsigned int value. After sanitizing the inputs,
it is returning -1. Changed it to return 0.
Fixes: 2df00d562d20 ("app/testpmd: add --portlist option")
Signed-off-by: Hariprasad Govindharajan <hariprasad.govindharajan@intel.com>
Acked-by: Bernard Iremonger <bernard.iremonger@intel.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>