mkdadi/BTP: smartfog/go/src/fogflow/master/topologyMgr.go; 17 LoC

Found a possible issue in [mkdadi/BTP](https://www.github.com/mkdadi/BTP) at [smartfog/go/src/fogflow/master/topologyMgr.go](https://github.com/mkdadi/BTP/blob/382a5ca49ff42e68b7683a9a6ce6a410efe91616/smartfog/go/src/fogflow/master/topologyMgr.go#L364-L380)

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 tk is reassigned at line 367

[Click here to see the code in its original context.](https://github.com/mkdadi/BTP/blob/382a5ca49ff42e68b7683a9a6ce6a410efe91616/smartfog/go/src/fogflow/master/topologyMgr.go#L364-L380)

Click here to show the 17 line(s) of Go which triggered the analyzer.

```go
for _, tk := range tp.Tasks { // trigger only part of the service topology
if isGeneratedByTask(topic, &tk) == true {
rootTask := TaskNode{}
rootTask.Task = &tk
rootTask.Children = make([]*TaskNode, 0)

// create a sub-tree for each input stream topic
for _, input := range tk.InputStreams {
subTreeRoot := findChildTaskTree(input.Topic, tp)
if subTreeRoot != nil {
rootTask.Children = append(rootTask.Children, subTreeRoot)
}
}

return &rootTask
}
}

```

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See the descriptions of the classifications [here](https://github.com/github-vet/rangeclosure-findings#how-can-i-help) for more information.

commit ID: 382a5ca49ff42e68b7683a9a6ce6a410efe91616