Update library types to fixed length types

[arjo129]

With variations in various boards, it seems necessary to update the library to used u_int16t rather than int. (which was bad practice).

[q2dg]

Hello. Is someone out there?

[arjo129]

Hi, what would you like to know?

[q2dg]

Hi! If this issue has been resolved. Thanks

[arjo129]

No it hasn't been resolved.

[gonzalj3]

Hello!
I went ahead and made changes to the uspeech.h file so that it contains u_int16t types instead of int. I also included the appropriate library. I wanted to add a message here because this issue seems a bit dated and I am new to helping in open source projects. In other words I just wanted to confirm that I was helping in an existing issue and that I didnt break anything.

[arjo129]

Yep thanks I'll take a look at the PR just give me a day or two, bit busy. In future you can reference you're pull request by mentioning the pull request number like so #PRnum #44. Cheers!