don't return false in 'polyfillaction'

If a polyfill or fallback isn't necessary, the little status text displays 'false'.

![old](https://cloud.githubusercontent.com/assets/1001186/4992492/7811b4da-69a1-11e4-93f5-f53d9b8637d4.png)
![new](https://cloud.githubusercontent.com/assets/1001186/4992491/78116d36-69a1-11e4-8bf3-786c0d625a79.png)