complete-into-braces incorrect when using localized sorting

[Torsten Nahm]

Configuration Information [Automatically generated, do not change]:
Machine: i486
OS: linux-gnu
Compiler: gcc
Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='i486' 
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='i486-pc-linux-gnu' 
-DCONF_VENDOR='pc' -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash' 
-DSHELL -DHAVE_CONFIG_H   -I.  -I../bash -I../bash/include -I../bash/lib 
  -g -O2 -Wall
uname output: Linux stream 2.6.22-14-generic #1 SMP Tue Feb 12 07:42:25 
UTC 2008 i686 GNU/Linux
Machine Type: i486-pc-linux-gnu

Bash Version: 3.2
Patch Level: 25
Release Status: release

Description:
    Completion into braces does not work correctly in some instances 
where filenames start with the same string but with different 
capitalizations thereof and localized sorting is enabled

Repeat-By:
    Use a localized bash and go into an empty directory.
    create the files "ya, xYb and xyc
    Type M-{
    This expands to xy{a,b,c}, with the y incorrectly lowercase for xYb
    Set LC_ALL=C
    Type M-{
    The expansion is now correct: x{Yb,y{a,c}}

Fix:
    A quick look at the code suggests that gcd determination in 
really_munge_braces depends on the array being sorted in ascending 
(byte) order, as supplied if the locale is set to C. If the sorting is 
localized, lowercase and uppercase are usually treated equally, and the 
gcd determination gets confused. A fix would be to use byte value 
sorting for complete-into-braces