bug#12600: 24.2.50; linum-mode: line numbers in fringe do not refresh when resizing frame

[martin rudalics]

>> emacs -Q
>>
>> Load large file, e.g. emacs.c. Buffer content must exceed one
>> screen.
>>
>> Enable linum mode with `M-x linum-mode'.
>>
>> Shrink frame. Maximize frame. Fringe on the left side is missing line
>> numbers.
>
> What do you mean by "shrink" and "maximize", exactly?  Clicking on the
> maximize button on the upper left corner of the Emacs frame (on
> MS-Windows) doesn't reproduce the problem.

It does so here.  For whatever reason the position reported by
`window-end' in `linum-update-window' is still the same as before the
maximize.  Moving the cursor by one character makes the numbers appear.

martin