bug#27717: other-window when there is no other window

[積丹尼 Dan Jacobson]

>>>>> "EZ" == Eli Zaretskii <eliz@gnu.org> writes:

EZ> If your ring has exactly one slot, then going to the next will end up
EZ> right where you started.  There's nothing odd about that, and no
EZ> special reason to signal an error or output a message.  You can
EZ> instantly know what happened without any message.

OK then don't print a message. But I hope you will implement my ideas
when the ring has more than one slot.