bug#60162: [PATCH] * lisp/cus-edit.el (setopt--set): Warn instead of rasing an error

[Eli Zaretskii]

> From: Philip Kaludercic <philipk@posteo.net>
> Date: Sat, 17 Dec 2022 16:35:08 +0000
> 
> Setopt checks the :type of a user option, and raises an user-error if
> the value doesn't match the type.  This can be annoying during
> initialisation, because minor mistakes interrupt everything and you are
> let with a partially loaded configuration.
> 
> I'd propose replacing the `user-error' with a `warn', that would still
> indicate mistakes, but continue loading the init.el.

This is fine by me, please install on the release branch.