chubaofs/chubaofs: cli/cmd/datanode.go; 11 LoC

Found a possible issue in [chubaofs/chubaofs](https://www.github.com/chubaofs/chubaofs) at [cli/cmd/datanode.go](https://github.com/chubaofs/chubaofs/blob/de488774b2fd34a2bc3f07bc0d7bcf54ad1139bc/cli/cmd/datanode.go#L72-L82)

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 node was used in a composite literal at line 81

[Click here to see the code in its original context.](https://github.com/chubaofs/chubaofs/blob/de488774b2fd34a2bc3f07bc0d7bcf54ad1139bc/cli/cmd/datanode.go#L72-L82)

Click here to show the 11 line(s) of Go which triggered the analyzer.

```go
for _, node := range view.DataNodes {
if optFilterStatus != "" &&
!strings.Contains(formatNodeStatus(node.Status), optFilterStatus) {
continue
}
if optFilterWritable != "" &&
!strings.Contains(formatYesNo(node.IsWritable), optFilterWritable) {
continue
}
stdout("%v\n", formatNodeView(&node, true))
}

```

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commit ID: de488774b2fd34a2bc3f07bc0d7bcf54ad1139bc