Empty result with max unsigned int value

[shiyuhang0]

Issue description

Empty result.

Example code

1. Insert into mysql

CREATE DATABASE test;

CREATE TABLE test.t(
 t_int_unsigned INT UNSIGNED
);

insert into test.t values (4294967295);

Query with go-sql-driver master. Here we use commit 0004702

	db, err := sql.Open("mysql", "root@tcp(127.0.0.1:3306)/test")
	if err != nil{
		println(err)
		return
	}
	defer db.Close()

	rows, err := db.Query("select * from test.t")
	if err != nil{
		println(err)
		return
	}
	if !rows.Next(){
		println("no rows")
		return
	}
	var v int64
	err = rows.Scan(&v)
	if err != nil{
		println(err)
	}
	println(v)

This code output no rows

Configuration

Driver version (or git SHA): 0004702

Go version: run go version in your console

Server version: E.g. MySQL 5.6, MariaDB 10.0.20

Server OS: E.g. Debian 8.1 (Jessie), Windows 10