Fixed issue #08470: Script are hard to debug in Survey Logic File

Before: 
![limesurvey sondages pro 2013-12-19 12 20 35](https://f.cloud.github.com/assets/1439428/1781916/9eac8dd0-689f-11e3-9b04-54ea538a6fce.png)
(With javascript alert )

After 
![limesurvey sondages pro 2013-12-19 12 17 12](https://f.cloud.github.com/assets/1439428/1781919/ad1ff906-689f-11e3-86fc-7c52af748a90.png)