[PATCHES] fix bugs in the python bindings

[William Brown]

On Thu, 2018-05-03 at 16:12 +1200, Douglas Bagnall via samba-technical
wrote:
> Procrastinating again, I found a number of segfaults and a seemingly
> endless series of memory leaks and unchecked allocations in the
> Python
> bindings. I managed to stop myself after the attached patches.
> 
> Douglas

Most of this looks sane to me. It's a pretty big patch though. I'd want
to run it with ASAN to be sure, but that may highlight more outstanding
cases.

Thanks,

William