bug#10144: 24.0.91; `pop-up-frames' with dedicated windows is broken: `C-x C-f'

[martin rudalics]

> Under Windows, I'd expect those bugs to manifest themselves by having
> a frame "flash" (because the find-file pops up a new frame which is
> immediately destroyed by the save-window-excursion).

I'm missing you here.  Returning from `save-window-excursion' won't
destroy a frame created within its body.

> In other window managers, the behavior can be arbitrarily different
> (e.g. it can prompt the user to place the new frame, not knowing that
> it will be destroyed right away).

martin