update go vet

.travis.yml

@@ -36,11 +36,11 @@ before_script:
   - sh -c "if [ '$ORM_DRIVER' = 'mysql' ]; then mysql -u root -e 'create database orm_test;'; fi"
   - sh -c "if [ '$ORM_DRIVER' = 'sqlite' ]; then touch $TRAVIS_BUILD_DIR/orm_test.db; fi"
   - sh -c "if [ $(go version) == *1.[5-9]* ]; then go get github.com/golang/lint/golint; golint ./...; fi"
+  - sh -c "if [ $(go version) == *1.[5-9]* ]; then go tool vet .; fi"
   - mkdir -p res/var
   - ./ssdb/ssdb-server ./ssdb/ssdb.conf -d
 after_script:
   -killall -w ssdb-server
   - rm -rf ./res/var/*
 script:
-  - go tool vet .
   - go test -v ./...