f811e0adb6 Stop using deprecated OutPoint functions (Tobin C. Harding)
Pull request description:
Either our CI is failing us or `deprecated` does not work as expected, either way we should not be using the `OutPoint::null()` or `is_null` functions any more because we deprecated them already.
ACKs for top commit:
Kixunil:
ACK f811e0adb6
apoelstra:
ACK f811e0adb6 successfully ran local tests
Tree-SHA512: 64e75601ce8062da78bbd9aea97792e35c728aa31255348413fe9b57ee585974370d3f59b5467d7e4a65dc05d2718aea18bb381e128c8410fbfde4a851006416