无符号64位和0比较编译不过

[luyuancpp]

给代码
virtual EBTStatus update_impl(Agent* pAgent, EBTStatus childStatus)
{
BEHAVIAC_UNUSED_VAR(pAgent);
BEHAVIAC_UNUSED_VAR(childStatus);
unsigned long long& opl = ((ClientAI*)pAgent)->player_id;
unsigned long opr = 0;
bool op = PrivateDetails::Equal(opl, opr);//一个是ull 一个是ul 我想两边比较应该和player_id 类型一直，策划经常会拿一个玩家id 去比较
return op ? BT_SUCCESS : BT_FAILURE;
}