bug#17047: 24.3.50; visual-line-mode + org-mode + C-f makes cursor jumps to unexpected position

[Nicolas Richard <theonewiththeevillook@yahoo.fr>]

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Hello,

I run (with latest trunk, but the problem exists in earlier builds too) :

$ src/emacs -Q ~/tmp/testemacs.org
then do:
M-x visual-line-mode RET
TAB ;; show the content of the headline
C-x 3 ;; the second line gets wrapped (repeat if needed to achieve effect).
C-n
C-f

At this point, cursor moves erroneously to the end of the headline,
although M-: (point) RET reports 8 as it should (so, only the cursor is
misplaced).

Alternatively, "C-n C-f" can be replaced by "M-g c 8", then inserting
chars shows where point really is.

Here's the testemacs.org file

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* foo
 f[[file:xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx]]

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In GNU Emacs 24.3.50.6 (i686-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2014-03-07 on geodiff-mac3
Windowing system distributor `The X.Org Foundation', version 11.0.11304000
System Description:	Gentoo Base System release 2.2

Configured using:
 `configure --with-x-toolkit=lucid 'CFLAGS= -O0 -g3''

Important settings:
  value of $LANG: fr_FR.UTF-8
  locale-coding-system: utf-8-unix

-- 
Nico.