* add CCNode::getChildrenCount()

cocos2dx/base_nodes/CCNode.cpp

@@ -319,6 +319,11 @@ CCArray* CCNode::getChildren()
 	return m_pChildren;
 }
 
+unsigned int CCNode::getChildrenCount(void)
+{
+    return m_pChildren ? m_pChildren->count() : 0;
+}
+
 /// camera getter: lazy alloc
 CCCamera* CCNode::getCamera()
 {

cocos2dx/include/CCNode.h

@@ -191,6 +191,8 @@ class CC_DLL CCNode : public SelectorProtocol, public CCObject
     
     CC_PROPERTY_READONLY(CCArray*, m_pChildren, Children)
     
+    unsigned int getChildrenCount(void);
+    
     /** A CCCamera object that lets you move the node using a gluLookAt
      */
     CC_PROPERTY_READONLY(CCCamera *, m_pCamera, Camera)