attempting fix for issue 305

fix for issue 305 

Encountered https://github.com/kliment/Printrun/issues/305#issuecomment-12306186
This edit removed the error and restores output to what I guess was the original content. Its logical output, in any case.
![Pronterface Web-Interface](https://f.cloud.github.com/assets/3945917/294645/113dfb52-9404-11e2-8fc1-bd68e291a058.png)

(This is a correction to the incorrect pull request https://github.com/kliment/Printrun/pull/345)

P.S. Not sure if this is the right method to submit changes, please advise if I'm in error.