CCArmature::boundingBox with child Armature bug?

Cocos2d-x
#1

http://www.cocos2d-x.org/forums/6/topics/41700

当CCArmature有子CCArmature时，发现boundingBox差点有点远，hack了一下源码，

CCRect CCArmature::boundingBox()
{
float minx, miny, maxx, maxy = 0;

bool first = true;

CCRect boundingBox = CCRectMake(0, 0, 0, 0);

CCObject *object = NULL;
CCARRAY_FOREACH(m_pChildren, object)
{
    if (CCBone *bone = dynamic_cast<CCBone *>(object))
    {
        CCArmature* child = bone->getChildArmature();
        //CCRect r = bone->getDisplayManager()->getBoundingBox();//hack by HanHongmin 2013-12-29
        CCRect r;
        if(child!=NULL){
            r = child->boundingBox();
        }else{
            r = bone->getDisplayManager()->getBoundingBox();
        }
        //hack finish

        if(first)
        {
            minx = r.getMinX();
            miny = r.getMinY();
            maxx = r.getMaxX();
            maxy = r.getMaxY();

            first = false;
        }
        else
        {
            minx = r.getMinX() < boundingBox.getMinX() ? r.getMinX() : boundingBox.getMinX();
            miny = r.getMinY() < boundingBox.getMinY() ? r.getMinY() : boundingBox.getMinY();
            maxx = r.getMaxX() > boundingBox.getMaxX() ? r.getMaxX() : boundingBox.getMaxX();
            maxy = r.getMaxY() > boundingBox.getMaxY() ? r.getMaxY() : boundingBox.getMaxY();
        }

        boundingBox.setRect(minx, miny, maxx - minx, maxy - miny);
    }
}

return CCRectApplyAffineTransform(boundingBox, nodeToParentTransform());

}

不知道是不是bug，也不知道改的对不对，反正最终效果还可以。
新手求指导啊~~~~