bug#1372: posn-at-x-y reports wrong window

[martin rudalics]

> (fringe-mode 0)
> C-x 3 C-x 2 C-x o C-x o
> (we're now in the large window on the right, with two small windows in
> the left half of the frame).
>
> Insert enough newlines to be vertically just above the horizontal
> divider on the left.
>
> M-: (posn-at-x-y 0 (cdr (posn-x-y (posn-at-point)))) RET
>
> Insert newline, now we're next to the divider line.
>
> M-: (posn-at-x-y 0 (cdr (posn-x-y (posn-at-point)))) RET
>
> --> wrong window (the window in the upper left) is given in the structure.
> Instead of 0, the x value can be up to 6 ((frame-char-width) reports 7).

Can you try the attached patch?

martin

*** window.c.~1.634.~   2008-11-18 18:56:23.703125000 +0100
--- window.c    2008-11-19 16:04:02.078125000 +0100
***************
*** 774,780 ****
        }
        else
        {
!         if (eabs (*x - x1) < grabbable_width)
            {
              /* Convert X and Y to window relative coordinates.
                 Vertical border is at the right edge of window.  */
--- 774,781 ----
        }
        else
        {
!         if ((WINDOW_RIGHTMOST_P (w) || *x < x1)
!             && eabs (*x - x1) < grabbable_width)
            {
              /* Convert X and Y to window relative coordinates.
                 Vertical border is at the right edge of window.  */