largefiles: don't crash when cloning to a remote repo The immediate crash was when checking for requirements immediately after this, but lfcommands.downloadlfiles() will also crash if --all-largefiles is specified. That has been in place since atleast 5884812686f7 (2.3-rc) without anyone noticing. I can't tell from the peer classes if there's a way to make the custom largefile functionality work in this case, but atleast it doesn't crash.