bug#12392: 24.2; emacs-gtk misinterprets floating-point numbers under certain locales on openSUSE 12.2

[Achim Gratz]

Steps to reproduce:

1. Start "LC_NUMERIC=de_DE.UTF-8 emacs-gtk -Q"
2. Type "0.25" in *scratch* buffer, then "C-j"

The input evaluates to "0.0" rather than "0.25".

The input is correctly interpreted when setting LC_NUMERIC=C.

This happens for both the EMacs 23.3 delivered with openSUSE 12.2 and
several self-compiled Emacsen, compiled both before the update to 12.2
and after the update to 12.2.  The update involved quite a lot of system
libraries, but I think this error relates to the update of glib from
2.14 to 2.15 somehow.

In GNU Emacs 24.2.1 (i686-suse-linux-gnu, GTK+ Version 2.24.10)
 of 2012-09-08 on Rainer
Windowing system distributor `The X.Org Foundation', version 11.0.11203000
Configured using:
 `configure '--with-wide-int' '--with-kerberos' '--with-kerberos5'
 '--without-gpm' 'CFLAGS=-fomit-frame-pointer -fmessage-length=0 -O2
 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector -funwind-tables
 -fasynchronous-unwind-tables -g -D_GNU_SOURCE -std=gnu99 -pipe
 -Wno-pointer-sign -Wno-unused-variable -Wno-unused-label
 -Wno-unprototyped-calls -fno-optimize-sibling-calls
 -DSYSTEM_PURESIZE_EXTRA=55000 -DSITELOAD_PURESIZE_EXTRA=10000'
 'LDFLAGS=-Wl,-O2 -Wl,--hash-size=65521'
 
'--enable-locallisppath=${datadir}/emacs/${version}/site-lisp:${datadir}/emacs/site-lisp:/usr/share/emacs/site-lisp''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: POSIX
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: C
  value of $LC_TIME: nil
  value of $LANG: de_DE.UTF-8
  value of $XMODIFIERS: @im=local
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t


Regards,
Achim.
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