bug#46904: Non-unique windows produced by window-state-put

[martin rudalics]

> When 'frame-root-window' returns an internal window,
> then we don't put the state into the root window anyway,
> we create a new window.  The patch does the same for the
> case when there is only one window too, so both cases
> will provide the same consistent result.

Yes.  But how would you handle `window-swap-states' now?

martin