bug#15382: desktop restores buffers in wrong order

[Juri Linkov <juri@jurta.org>]

>> Another bug is that point of the top restored buffer
>> is placed to a wrong position because `desktop-saved-frameset'
>> saves point of one buffer (possibly non-persistent), but
>> after restoring the desktop, `window-state-put' restores that point
>> to another buffer (persistent and restored from the desktop file),
>> thus applying the value of point of one buffer to another buffer.
>
> IIUC this can happen only if a buffer doesn't exist when restoring.  I
> tried to address this issue in revision#114294.  Please have a look.

Thanks, I verified that now it doesn't restore point in wrong buffer
from a non-existent buffer.

A question whether such non-existent buffers should be also
saved/restored is a separate question.  Maybe they should,
with some empty placeholder buffers if buffer content
can't be restored?