cocos2d/cocos2d-x — pull request #1286 by moadib (2012-09-05 07:48:57+00:00)
Title: Fixed crash with CCLabelBMFont

Fixed crash with CCLabelBMFont when center- or right-aligned text have line breaks each other

You can reproduce crash with
```
CCLabelBMFont* text = CCLabelBMFont::create("abc\n\n1", "font.fnt");
text->setAlignment(kCCTextAlignmentCenter);
addChild(text);
```