Fix govet warnings
Fix govet warnings

tangle329/cni,mcastelino/cni,squeed/plugins,containernetworking/cni,squeed/plugins,steveeJ/cni,mcastelino/cni,containernetworking/plugins,tomdee/cni,rosenhouse/cni,containernetworking/cni,tomdee/cni,murat1985/cni,containernetworking/plugins,kad/cni,jonboulle/cni,tangle329/cni,dcbw/cni,achanda/cni,aanm/cni,murat1985/cni,luxas/cni,jonboulle/cni,steveeJ/cni,appc/cni,appc/cni,luxas/cni,kad/cni,rosenhouse/cni,squaremo/cni,squaremo/cni,achanda/cni,aanm/cni,dcbw/cni