Address a few lint suggestions.
Address a few lint suggestions.

ArtemTeleshev/go-protobuf,skyportsystems/go-protobuf,ekle/protoc-gen-goweb,trdata/protobuf,jrbarron/protobuf,tamird/protobuf-2,eduardiazf/protobuf,tamird/protobuf-2,fuchsia-mirror/third_party-github.com-golang-protobuf,jmptrader/protobuf-1,qinlodestar/protobuf,ekle/protoc-gen-goweb_test,francoishill/protobuf,trdata/protobuf,kung-foo/protobuf,daemonl/protobuf,jeremyletang/protobuf,golang/protobuf,skyportsystems/go-protobuf,aoeu/protobuf,adnaan/protobuf,mwitkow-io/protobuf,fuchsia-mirror/third_party-github.com-golang-protobuf,csuideal/protobuf,golang/protobuf,alskjstl/protobuf