FIX. Haxe. cast(a, B).<complete>

Before:
step1:
![1](https://f.cloud.github.com/assets/1700940/2257896/ccb37002-9e20-11e3-8810-777daf7f4560.png)
result:
![2](https://f.cloud.github.com/assets/1700940/2257903/d4726a14-9e20-11e3-85a1-99a77153b597.png)

After:
step1:
![3](https://f.cloud.github.com/assets/1700940/2257904/da1703da-9e20-11e3-907d-3e2f0c2dafc1.png)
step2:
![4](https://f.cloud.github.com/assets/1700940/2257906/dd3b8234-9e20-11e3-891a-abac73cd57d2.png)