Missing function definitions in capabilities.h, include in mtrack-test.c

[Iritscen]

Apologies if I'm not doing GitHub right (newbie), but I wanted to mention that, in attempting to build the code, I was stopped by implicit declaration warnings because capabilities.h is missing definitions for get_cap_xmin() and get_cap_ymin(). This problem was introduced in commit 6f03cc5.

I also had to include unistd.h in mtrack-test.c in order for main() to be able to make use of close(). Having corrected these two points, the code built for me.

Not sure how others have been building the code without hitting these issues, so I feel like I did something wrong, but I merely ran "./configure" and "make" per usual. Anyway, thanks for continuing to maintain this project; I desperately need it to make this MacBook usable in Ubuntu.

[p2rkw]

Thanks for report.

Honestly I never used mtrack-test because xinput is superior. I will fix that in free time, alternatively you could create PR for that.