datatogether/task_mgmt: tasks/task.go; 21 LoC

Found a possible issue in [datatogether/task_mgmt](https://www.github.com/datatogether/task_mgmt) at [tasks/task.go](https://github.com/datatogether/task_mgmt/blob/a3f3dabe49725d6d7d47bd35a186c9f606a227c9/tasks/task.go#L192-L212)

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 p is reassigned at line 196

[Click here to see the code in its original context.](https://github.com/datatogether/task_mgmt/blob/a3f3dabe49725d6d7d47bd35a186c9f606a227c9/tasks/task.go#L192-L212)

Click here to show the 21 line(s) of Go which triggered the analyzer.

```go
for p := range pc {
// TODO - log progress and pipe out of this func
// so others can listen in for updates
// fmt.Println(p.String())
task.Progress = &p
tc <- task

if p.Error != nil {
task.Error = p.Error.Error()
now := time.Now()
task.Failed = &now
go task.Save(store)
return p.Error
}
if p.Done {
now := time.Now()
task.Succeeded = &now
go task.Save(store)
return nil
}
}

```

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commit ID: a3f3dabe49725d6d7d47bd35a186c9f606a227c9