junhuazheng/zjh: learn/04_面试题二1.go; 3 LoC

Found a possible issue in [junhuazheng/zjh](https://www.github.com/junhuazheng/zjh) at [learn/04_面试题二1.go](https://github.com/junhuazheng/zjh/blob/780b840b4f5a82203a1827280b98c59e64b70acb/learn/04_面试题二1.go#L19-L21)

Below is the message reported by the analyzer for this snippet of code. Beware that the analyzer only reports the first
issue it finds, so please do not limit your consideration to the contents of the below message.

> reference to stu is reassigned at line 20

[Click here to see the code in its original context.](https://github.com/junhuazheng/zjh/blob/780b840b4f5a82203a1827280b98c59e64b70acb/learn/04_面试题二1.go#L19-L21)

Click here to show the 3 line(s) of Go which triggered the analyzer.

```go
for _, stu := range stus {
m[stu.Name] = &stu
}

```

Leave a reaction on this issue to contribute to the project by classifying this instance as a **Bug** :-1:, **Mitigated** :+1:, or **Desirable Behavior** :rocket:
See the descriptions of the classifications [here](https://github.com/github-vet/rangeclosure-findings#how-can-i-help) for more information.

commit ID: 780b840b4f5a82203a1827280b98c59e64b70acb