Channel 类的 isEmpty 方法逻辑错误

[zither]

//php_channel.c#L148
/**
 * 通道是否为空
 */
PHP_METHOD(workerman_channel, isEmpty) {
	wmChannelObject *chan_t;
	wmChannel *chan;
	chan_t = (wmChannelObject*) wmChannel_fetch_object(Z_OBJ_P(getThis()));
	chan = chan_t->chan;
	int num = wmChannel_num(chan);
	bool is_exist = (num > 0);                 //实际判断的是 channel 非空
	RETURN_BOOL(is_exist);
}

该方法实际逻辑和名字完全相反。