Backport to 3.3 of bug fix for #6315 smbd crashes doing vfs_full_audit on IPC$ close event

[Jeremy Allison]

Hi Karolin,

I'd like to have the attachment to bug #6315 pushed into
the 3.3 tree. The attachment is here.

https://bugzilla.samba.org/attachment.cgi?id=4100&action=view

But I need someone else to sign off on this first please.
So this is a request for someone else to review this fix :-).

Thanks,

Jeremy.