bug#16647: Imprecisions with window-resizing cursors

[martin rudalics]

> First impressions: Before splitting the window horizontally (with the
> backwardsly-named split-window-vertically), I notice that I get the
> changed mouse cursor indicating that I can resize the window whenever I
> cross the mode line / bottom divider, but, in fact, I am only able to
> use it (to increase the size of the minibuffer) when the minibuffer is
> active. When the minibuffer is inactive, I can't resize it, yet the
> mouse cursor still changes indicating that I can. Presumably this is a
> bug.

Should be fixed now.  Please look again.

> But:
>
>     emacs -Q
>     M-: (set-frame-parameter nil 'bottom-divider-width 10) RET
>     M-: (setq mouse-autoselect-window t)
>     Drag the window divider up a few pixels (but less than one line)
>
> Moving the mouse cursor upwards is as before.
>
> Moving the mouse cursor downwards is as before except that when it
> crosses the bottom of the bottom divider into the bottom window, the
> focus changes to the bottom window, _but_ the resizing mouse cursor
> continues to be displayed well in to the bottom window, but will not
> resize the window if clicked on there -- indeed clicking on it, I can
> select text in the bottom window while it is still displayed as a
> resizing cursor!

Should work with my previous fix.  Please check again.

martin