proposal: return blank identifier as zero value

[chai2010]

func decodConfig(r io.Reader) (image.Config, bool) {
    if cfg, err := image.DecodConfig(r); err == nil {
        return cfg, true
    }
    return _, false // return image.Config{}, false
}

[cespare]

For previous discussion of this topic, see

https://groups.google.com/forum/#!topic/golang-nuts/Ii2rmcm483Q

(The first response to that proposal, from @ianlancetaylor, links to 3 previous proposals.)

[chai2010]

@cespare Thanks for your link.

[davecheney]

Based on the extended discussion in https://groups.google.com/d/msg/golang-nuts/Ii2rmcm483Q/hU6DHLzMbjIJ, I am closing this proposal.

Please feel free to comment if you think this is premature.