bug#65708: 30.0.50; Wrong default value for functions in filesets.el

[Stefan Kangas]

Mauro Aranda <maurooaranda@gmail.com> writes:

> The following user options:
> filesets-browse-dir-function
> filesets-open-file-function
> filesets-save-buffer-function
> filesets-commands
> filesets-external-viewers
>
> have overridden the default value of the function widget to the value
> nil.  That's an invalid default value.  It'd be better to just remove
> that.

Makes sense, but you forgot to attach the patch.  ;-)