K.L.

Results 3 issues of K.L.

人名重名非常多,以出现频次作为权重才能获得正确分布。

I tried set a _max_seq_ value other than *2048*, I got errors. And I checked related code and fixed it.

This seems a bug, also [reported by @xiezipeng-ML](https://github.com/FasterDecoding/Medusa/issues/101). Please review.