taf2/speech2text — pull request #9 by Ases (2012-10-26 11:17:10+00:00)
Title: fix a bug when no hypothesis is returned

`{"status":5,"id":"b3224733ce27875cc6a02c91f4f161c5-1","hypotheses":[]}`

```
NoMethodError: undefined method `[]' for nil:NilClass
from /usr/local/rvm/gems/ruby-1.9.3-p286/gems/speech2text-0.3.6/lib/speech/audio_to_text.rb
```