bug#5567: `next-window' does not behave as documented WRT visible frames

[Glenn Morris]

Version: 24.1

Michael Shields wrote:

> `next-window' and related functions like `display-buffer' say in their
> docstrings and in the source code comments that an argument of 0 or
> 'visible will consider windows on visible or visible-or-iconified
> frames. However, the actual behavior is to consider only frames on the
> current terminal. The attached patch updates the documentation to
> match the behavior.

Thank you for the patch, which is now applied. Sorry for the delay.

> Legal note: I have a copyright assignment on file, and my employer, Google,
> also has a copyright assignment on file.

For the record; your assignment appears to only be for Gnus, not for Emacs.
However, this change is small enough not to need an assignment.