bug#66485: 13.2.1; preview-scale-function should be safe for numberp

[Arash Esbati]

David Kastrup <dak@gnu.org> writes:

> The question is whether this should be enough of a worry to stop such
> settings to take effect automatically.  I am not saying that it should,
> just that this is the metric for making this change.

Thanks for the clarification, now I see what you mean.  In this case, I
think Philipp made a good suggestion to use another predicate like:

(lambda (x) (and (numberp x) (> x 0) (<= x 10))

WDYT?

Best, Arash