alexreisner/geocoder — pull request #366 by sld (2012-12-29 12:35:56+00:00)
Title: Fixing error with Yandex

If I try to find some location without city in yandex it give an error:

```
geocode 57.423359 55.892596 -s yandex
ruby-1.9.3-p327/gems/geocoder-1.1.6/lib/geocoder/results/yandex.rb:20:in `city': undefined method `[]' for nil:NilClass (NoMethodError)
```

It happpens because for some regions Yandex not provide the city or town.

Now if city not presented empty string would return - "".