bug#3437: 23.0.91; kill-visual-line at the end of logical line deletes also th next line

When "kill-visual-line" command is executed at the end of line it kills
the next line up to the cursor column. To reproduce:

 1. Take a scratch buffer. Turn on visual-line-mode:

        C-u M-x visual-line-mode RET

 2. Put the following lines to the buffer (at the column 0):

        foobar
        123456789

 3. Move the cursor at the end of "foobar" line.

 4. Execute kill-visual-line (C-k). The buffer looks like this:

        foobar789


I think the expected result would be

        foobar123456789

with the point between "r" and "1". This is how "kill-line" works, that
is, only kill the newline.



In GNU Emacs 23.0.91.1 (i486-pc-linux-gnu, GTK+ Version 2.12.11))
 of 2009-03-21 on elegiac, modified by Debian
 (emacs-snapshot package, version 1:20090320-1~lenny1)
Windowing system distributor `The X.Org Foundation', version 11.0.10402000
configured using `configure  '--build' 'i486-linux-gnu' '--host' 'i486-linux-gnu' '--prefix=/usr' '--sharedstatedir=/var/lib' '--libexecdir=/usr/lib' '--localstatedir=/var' '--infodir=/usr/share/info' '--mandir=/usr/share/man' '--with-pop=yes' '--enable-locallisppath=/etc/emacs-snapshot:/etc/emacs:/usr/local/share/emacs/23.0.91/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/23.0.91/site-lisp:/usr/share/emacs/site-lisp' '--with-x=yes' '--with-x-toolkit=gtk' 'build_alias=i486-linux-gnu' 'host_alias=i486-linux-gnu' 'CFLAGS=-DDEBIAN -DSITELOAD_PURESIZE_EXTRA=5000 -g -O2' 'LDFLAGS=-g -Wl,--as-needed' 'CPPFLAGS=''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: en_US.UTF-8
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: fi_FI.UTF-8
  value of $XMODIFIERS: @im=none
  locale-coding-system: utf-8-unix
  default-enable-multibyte-characters: t

Major mode: Group

Minor modes in effect:
  TeX-PDF-mode: t
  gnus-agent-mode: t
  shell-dirtrack-mode: t
  gnus-undo-mode: t
  ergo-movement-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  global-auto-composition-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t