[PATCH 0/2] a few format-patch leak fixes

I got bit earlier by the leak-checker complaining about an old leak on jc/send-email-pre-process-fix, so I started to poke at the code. I see that you since silenced it via 20bd08aefb (t9001: mark the script as no longer leak checker clean, 2023-05-17).

I think that's an OK solution for the release period. But since I dug into the actual leak, I didn't want those fixes to go to waste. :)

So these can be applied at our leisure post-release, though I think the first one could also be taken independently, and is enough to fix t9001 (obviously we could also take them both, but the first one is the less risky of the two, since we're in an -rc period).

  [1/2]: format-patch: free rev.message_id when exiting
  [2/2]: format-patch: free elements of rev.ref_message_ids list

 builtin/log.c         | 15 ++++++++-------
 t/t9001-send-email.sh |  2 +-
 2 files changed, 9 insertions(+), 8 deletions(-)

-Peff