Fixing CCBReader problem for CCScale9Sprite

Today, when making some unit tests to check the behaviour of the CCBReader (CocosBuilder Reader); 
Found 2 issues when adding a CCScale9Sprite to the Interface;

1. Crash if the interface included a CCScale9Sprite Node:
https://github.com/cocos2d/CCBReader/issues/16

2. The CCScale9Sprite Node have a wrong opacity setting
https://github.com/cocos2d/CCBReader/issues/17

Hope this small pieces of information helps