Dmitriy Kulagin

Probably I'm not right. Elements of underlying array of upper slice of [][]string have to be slice headers. So, probably right result should be 26(string+header)+24(upper slice header)+24*1000(upper slice elements)=24050. 8074...

Probably fix: ``` >>>>>> size.go:37 case reflect.Slice: -- // return 0 if this node has been visited already ++ // return slice header size if this node has been visited...

I'm pretty sure that this MR can fix several different issues that I've described in this [issue](https://github.com/segmentio/kafka-go/issues/1416)