Typo in encoding.h#L39

[ccsexyz]

https://github.com/xtaci/libkcp/blob/master/encoding.h#L39
There should be uint16_t or unsigned short.

[xtaci]

yes, forgot to fix this in public repository. thanks!

ps. what's your major in uestc?

[ccsexyz]

computer science and technology.