function ends without a return statement

+ go get github.com/fiorix/go-redis/redis
# github.com/fiorix/go-redis/redis
/usr/lib/go/src/pkg/github.com/fiorix/go-redis/redis/redis.go:318: function ends without a return statement
/usr/lib/go/src/pkg/github.com/fiorix/go-redis/redis/redis.go:333: function ends without a return statement