Makes helmet icon south state consistent with east/west states

Made security helmet south sprite consistent with the east/west ones. The side view shows the sides of the helmet coming down towards the back, not up. Now the front view agrees with this.


![helmet2](https://cloud.githubusercontent.com/assets/242428/5023491/7e2fc2ea-6ac7-11e4-9646-ce00656feec9.png)