如题   list<unsigned int>::iterator itor_space;//定义itor_space;
   
       在使用初始化时编译不了
      CDisagreeDlg::CDisagreeDlg(CWnd* pParent /*=NULL*/)
    : CDialog(CDisagreeDlg::IDD, pParent)
{
    //{{AFX_DATA_INIT(CDisagreeDlg)
        // NOTE: the ClassWizard will add member initialization here
    //}}AFX_DATA_INIT
    m_pView = NULL;
    itor_1Lel =NULL;
    itor_space = NULL;//1这个位置出错，信息如下，#define NULL 0
 错误信息：
d:\booleanalign源码和驱动程序\booleanalign_6.1.7\booleanalign\disagreedlg.cpp(30) : error C2679: 二进制“=”: 没有找到接受“int”类型的右操作数的运算符(或没有可接受的转换)
        i:\program files\microsoft visual studio 9.0\vc\include\list(427): 可能是“std::list<_Ty>::_Iterator<_Secure_validation> &std::list<_Ty>::_Iterator<_Secure_validation>::operator =(const std::list<_Ty>::_Iterator<_Secure_validation> &)”
        with
        [
            _Ty=unsigned int,
            _Secure_validation=true
        ]
        试图匹配参数列表“(std::list<_Ty>::_Iterator<_Secure_validation>, int)”时
        with
        [
            _Ty=unsigned int,
            _Secure_validation=true
        ]
}
程序在VC6.0中可以编译，2008中过不去，请教高人如何解决？