bug#69664: Additional patch

[Eli Zaretskii]

> Date: Tue, 12 Mar 2024 16:06:58 -0500
> From: Adam Porter <adam@alphapapa.net>
> 
> Please see the attached patch, which should be applied on top of the 
> previous one.  It handles the case in which the old object is not found 
> in the vtable, avoiding calling ELT with a nil position argument.

Thanks, installed, and closing the bug.

Please in the future mention the bug number, when known, in the commit
log message, to avoid the possibility that the committer forgets to
add it.