Fixed small style issue

Before:
![bildschirmfoto 2013-07-15 um 00 08 53](https://f.cloud.github.com/assets/1836347/795018/26df80ac-ecd3-11e2-92a8-7aa08318adc4.png)

After:
![bildschirmfoto 2013-07-15 um 00 07 57](https://f.cloud.github.com/assets/1836347/795017/26c90dc2-ecd3-11e2-80ab-198619dba1a8.png)

Topic @ WoltLab Beta-Forum http://bit.ly/16CIYIi