[O] bug#9179: 24.0.50; Org-agenda window splitting does not use full frame when fraction set to 1.0

[martin rudalics]

> 1. M-: (setq org-agenda-window-frame-fractions '(1.0 . 1.0)) RET
> 2. M-x org-agenda a
>
> Expected results: The *Org Agenda* buffer occupies the entire frame
> Actual results: The *Org Agenda* buffer occupies the entire frame EXCEPT
> for a five line window at the top of the frame

Due to fact that `fit-window-to-buffer' no more deletes other windows by
side-effect.  Hence for the '(1.0 . 1.0) case `org-fit-agenda-window'
(or `org-fit-window-to-buffer') should call `delete-other-windows' or
something the like.

martin