encoding/xml: attr does not work with pointer receiver.

[nkatsaros]

See http://play.golang.org/p/OeSXsazIDS

If you unmarshal <Param2 int="1" />

into

type Param2 struct {
    Int *int `xml:"int,attr"`
}

Int will always be nil. As seen in the example, this works if Int is an element and not
an attribute.

[nkatsaros]

Comment 1:

This is a duplicate of https://golang.org/issue/3719 that I missed
in my search.

[minux]

Comment 2:

Status changed to Duplicate.

Merged into issue #3719.