interface: fix coverity issue
interface: fix coverity issue

Change-Id: I5bb1ab3a57097bf03e7de5541cc8496655bc728f
Signed-off-by: Mohammed Hawari <e345ebb5fb15a590b29a075cdaf46eed42e192de@hawari.fr>
Type: fix
Fixes: 5b22339973feaa3eba48ead1e9fb428b1816c0cc

chrisy/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,FDio/vpp,chrisy/vpp