It's always better to do the drums first, even if it's just a dummy track as some have said before. And when the drums stop playing make sure the drum keeps hitting the hi-hat (in metronome fashion) that way when the guitars record they have something to follow and everything will stay synchronized. Then once everything is together, you could easily use any audio editing software to silence the hi-hat.

Now if the drummer makes mistakes, and depending on what kind of mistake. It's is very easy to fix. If it's a mistake that throws the tempo off, you'll just have to do it over again from scratch. If it's just a small mistake like missing a beat but the flow of the music (tempo) stays on track. You can have the drum play on another track along with the previous track and then later cut out the mistake and replace it with the correct one. Make sure you start a few seconds before the mistake and a few seconds after. That way the tracks will go together smooth. Again this depends on what kind of mistake, and if there are quite a few. You're better off doing it over again.