ZERO_RESULTS not an error

[ewgRa]

For now, when geocoding request have response status ZERO_RESULTS, it is considered as error.

Looks really strange, since it is not an error.
On such response status my service will response 204 for example.
When status 'OK' - then just response 200
In another cases it is really error and I want log it and response 500

I see only one way to achieve it - 'if err != nil && err == "maps: ZERO_RESULTS - "' and it is really ugly.

I have call "result, err := c.Geocode(context.Background(), r)". Any idea how to make it not so ugly?

For me more natural looks PR to Geocode func, that will check if response status "ZERO_RESULTS", than just return empty results. Is such PR have change to be merged, since it will broke backward compatibility?

[domesticmouse]

Please raise a PR, I'll merge it.

[ewgRa]

PR done #116

[domesticmouse]

Thanks!