Fixes NoMethodError execption caused by typo

### Expected

```
Waited for 14.0 for segment marked 'grass' to become selected (Calabash::Cucumber::WaitHelpers::WaitError)
```

### Found
```
Then I should see segment "sand" in segmented control "image chooser" is not selected5 ms

undefined method `to_i' for [1]:Array (NoMethodError)
./briar-gem/lib/briar/control/segmented_control.rb:42:in `should_see_segment_with_selected_state'
```