fixing witness cta

fixing broken witness CTA

Before
--------
![image](https://cloud.githubusercontent.com/assets/960919/3103684/deb1e374-e65a-11e3-8da7-1e78bce53b68.png)
After
--------
![image](https://cloud.githubusercontent.com/assets/960919/3103688/ef4a2f0c-e65a-11e3-8b95-4ac4b2f7b445.png)