Freeseer Exception when talk database is empty

...talk-editor.

fix : The runaway bug at the recording when it is not registered in the talk-editor.

BEFORE
Freeseer will not stop even if you press the stop button
![Screen Shot 2013-02-20 at 18 24 14](https://f.cloud.github.com/assets/2756096/175211/6956db2a-7b3f-11e2-999e-3711a91f39ca.png)

AFTER
Even if data can not be taken from Talk editor ,Freeseer can start recording.
![Screen Shot 2013-02-20 at 18 26 22](https://f.cloud.github.com/assets/2756096/175223/a51351de-7b3f-11e2-85a5-a49d263011ca.png)