void OptionTree::SetOption(int id)
{
	Option *opt = option[id];
	ASSERT(opt);
	SetChildren(id, opt->Get());
	for(;;) {
		id = GetParent(id);
		if(id < 0)
			break;
		bool t = false;
		bool f = false;
		bool n = false;
		for(int i = 0; i < GetChildCount(id); i++) {
			int chid = GetChild(id, i);
			Option *opt = option[chid];
			if(opt) {
				int x = opt->Get();
				if(x == 1)
					t = true;
				else
					if(x == 0)
						f = true;
					else
						n = true;
			}
		}
		opt = option[id];
		if(opt) {
			if(t && f || n) {
				opt->Set(Null);
			}
			else
				opt->Set(t);
		}
	}
	WhenOption(); <<-------- This is the addition
}