milQA/hw2: signer.go; 22 LoC

Found a possible issue in [milQA/hw2](https://www.github.com/milQA/hw2) at [signer.go](https://github.com/milQA/hw2/blob/f33c8e90934e8418e55c48cfa54e8de33db933cc/signer.go#L62-L83)

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.

> range-loop variable input used in defer or goroutine at line 65

[Click here to see the code in its original context.](https://github.com/milQA/hw2/blob/f33c8e90934e8418e55c48cfa54e8de33db933cc/signer.go#L62-L83)

Click here to show the 22 line(s) of Go which triggered the analyzer.

```go
for input := range in {
wg.Add(1)
go func(wg *sync.WaitGroup) {
data := input.(string)
var answer []string
ch := make([]chan string, 6)
for th := 0; th < 6; th++ {
ch[th] = make(chan string)
go fcrc32(ch[th], strconv.Itoa(th)+data)
}
for th := 0; th < 6; th++ {
answer = append(answer, <-ch[th])
}
ans := ""
for _, value := range answer {
ans = ans + value
}
out <- ans
wg.Done()
}(wg)
runtime.Gosched()
}

```

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: f33c8e90934e8418e55c48cfa54e8de33db933cc