karmi/tire — pull request #496 by timon (2012-10-29 11:30:41+00:00)
Title: Using Tire::search without payload produces unexpected results

Running this piece of code
```ruby
s = Tire.search 'articles-test'
s.query { string 'ruby' }
s.facet 'tags' do
filter :term, :tags => 'ruby'
end
```

produces full index contents in result.

As I take it from documentation, building query step by step should be possible.
This pull request allows building query without specifying payload on Tire::search call