bug#9296: 24.0.50; next-line/prev-line on lines with images

[Lars Magne Ingebrigtsen]

The following test case should display the problem(s):

(url-retrieve
 
"http://quimby.gnus.org/circus/jukebox.php?image=thumbnail.png&group=Various&album=Bossa%20Nova%20and%20the%20Rise%20of%20Brazilian%20Music%20in%20the%201960s%20%281%29";
 (lambda (status)
   (goto-char (point-min))
   (search-forward "\n\n")
   (let ((data (buffer-substring (point) (point-max))))
     (pop-to-buffer "*image*")
     (setq truncate-lines t)
     (let ((image (create-image data 'png t)))
       (dotimes (i 50)
         (insert-image image)
         (insert " Bossa Nova and the Rise of Brazilian Music in the 1960s (1) 
-> Various/Bossa Nova and the Rise of Brazilian Music in the 1960s (1)\n"))))))

My frame is 80 characters wide, which might make some difference.  And
`truncate-lines' off and on displays different (buggy) mouse behaviours
on `down'.  But it seems like lines that are longer than the frame width
is necessary to trigger the bugs.

-- 
(domestic pets only, the antidote for overdose, milk.)
  bloggy blog http://lars.ingebrigtsen.no/