bug#3522: Tab doesnt automatically correct dir names during Find-file

[Mukesh Gupta <mukeshg@inn.mentorg.com>]

i've recently (9th June 2009) installed Emacs 22.3.1

When i use C-x-f (find-file) command and try to complete a unique directory name
(say ~/Txt) by giving (~/tx) and then pressing TAB, it doesnt correct
(and complete) the case from 'tx' to 'Txt' although this is the only directory.

This is working perfectly in preinstalled (/usr/bin) Emacs 21.3.1.
% uname -a
Linux inndesk158 2.6.9-67.ELsmp #1 SMP Wed Nov 7 13:56:44 EST 2007 x86_64 x86_64 x86_64 GNU/Linux

# My Invocation command is:
~/etc.linux.gcc346_64/bin/emacs --no-init-file


In GNU Emacs 22.3.1 (x86_64-unknown-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2009-06-10 on inndesk158
Windowing system distributor `The X.Org Foundation', version 11.0.60802000
configured using `configure  '--prefix=/home/mukeshg/etc.linux.gcc346_64''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8
  default-enable-multibyte-characters: t

Major mode: Fundamental

Minor modes in effect:
  tooltip-mode: t
  tool-bar-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  blink-cursor-mode: t
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  auto-compression-mode: t
  line-number-mode: t

Recent input:
<help-echo> <help-echo> <S-right> C-x C-f <M-backspace> 
t x <tab> <tab> <tab> C-g M-x r e p <tab> o r <tab> 
<return>

Recent messages:
("/home/mukeshg/etc.linux.gcc346_64/bin/emacs" "--no-init-file")
For information about GNU Emacs and the GNU system, type C-h C-a.
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