patch for testing any changes to fsx

_kirk@…_ originally submitted this as _[ticket:16](https://fstools.macosforge.org/trac/ticket/16)_
-   **Owner:** _somebody_
-   **Cc:** _krussell@…_

---

https://github.com/kirussel/portablefstools/compare/master...kirussel/fsxtests

I generated some quick tests to make sure any changes to fsx.c don't have any unexpected results.
