lctop: quick & dirty fix for column alignment

A quick & dirty fix for column alignment.

Before:
![before](https://cloud.githubusercontent.com/assets/186807/3047919/34e4b302-e13d-11e3-9b19-4161a7e2bd10.png)

After:
![after](https://cloud.githubusercontent.com/assets/186807/3047920/37b5c2f6-e13d-11e3-9f8a-ba0987d8f9e1.png)