ref: more go vet fixes (that do not appear on darwin)
ref: more go vet fixes (that do not appear on darwin)

Change-Id: I67c0050454b0eb4d1e855db93e8672a9f119e82e

vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref