Fix wrong environment variable check

LC_CTYPES should be checked instead of LC_MESSAGES.

Fix the third report of mutoh#5.

Debian bug #520181:
  http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=520181

Patch by Hleb Valoshka. Thanks!!!
Rreported by Adeodato Simó. Thanks!!!

lib/locale/driver/env.rb

@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 #
 # Copyright (C) 2012  Kouhei Sutou <[email protected]>
+# Copyright (C) 2012  Hleb Valoshka
 # Copyright (C) 2008  Masao Mutoh
 #
 # Original: Ruby-GetText-Package-1.92.0.
@@ -33,19 +34,19 @@ module Driver
     module Env
       module_function
 
-      # Gets the locale from environment variable. (LC_ALL > LC_MESSAGES > LANG)
+      # Gets the locale from environment variable. (LC_ALL > LC_CTYPES > LANG)
       # Returns: the locale as Locale::Tag::Posix.
       def locale
         # At least one environment valiables should be set on *nix system.
-        [ENV["LC_ALL"], ENV["LC_MESSAGES"], ENV["LANG"]].each do |loc|
+        [ENV["LC_ALL"], ENV["LC_CTYPES"], ENV["LANG"]].each do |loc|
           if loc != nil and loc.size > 0
             return Locale::Tag::Posix.parse(loc)
           end
         end
         nil
       end
 
-      # Gets the locales from environment variables. (LANGUAGE > LC_ALL > LC_MESSAGES > LANG)
+      # Gets the locales from environment variables. (LANGUAGE > LC_ALL > LC_CTYPES > LANG)
       # * Returns: an Array of the locale as Locale::Tag::Posix or nil.
       def locales
         locales = ENV["LANGUAGE"]

lib/locale/driver/posix.rb

@@ -30,7 +30,7 @@ module Posix
       $stderr.puts self.name + " is loaded." if $DEBUG
 
       module_function
-      # Gets the locales from environment variables. (LANGUAGE > LC_ALL > LC_MESSAGES > LANG)
+      # Gets the locales from environment variables. (LANGUAGE > LC_ALL > LC_CTYPES > LANG)
       # Only LANGUAGE accept plural languages such as "nl_BE;
       # * Returns: an Array of the locale as Locale::Tag::Posix or nil.
       def locales

test/test_detect_general.rb

@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 #
 # Copyright (C) 2012  Kouhei Sutou <[email protected]>
+# Copyright (C) 2012  Hleb Valoshka
 # Copyright (C) 2009-2010  Masao Mutoh
 #
 # License: Ruby's or LGPL
@@ -27,14 +28,14 @@ def setup
     Locale.init
     Locale.clear_all
     ENV["LC_ALL"] = nil
-    ENV["LC_MESSAGES"] = nil
+    ENV["LC_CTYPES"] = nil
     ENV["LANG"] = nil
     ENV["LANGUAGE"] = nil
   end
 
   def test_lc_all
     ENV["LC_ALL"] = "ja_JP.eucJP"
-    ENV["LC_MESSAGES"] = "zh_CN.UTF-8"  #Ignored.
+    ENV["LC_CTYPES"] = "zh_CN.UTF-8"  #Ignored.
     ENV["LANG"] = "ko_KR.UTF-8"  #Ignored.
     ENV["LANGUAGE"] = nil
 
@@ -50,7 +51,7 @@ def test_lc_all
 
   def test_lc_messages
     ENV["LC_ALL"] = nil
-    ENV["LC_MESSAGES"] = "ja_JP.eucJP"
+    ENV["LC_CTYPES"] = "ja_JP.eucJP"
     ENV["LANG"] = "ko_KR.UTF-8"  #Ignored.
     ENV["LANGUAGE"] = nil
 
@@ -66,7 +67,7 @@ def test_lc_messages
 
   def test_lang
     ENV["LC_ALL"] = nil
-    ENV["LC_MESSAGES"] = nil
+    ENV["LC_CTYPES"] = nil
     ENV["LANG"] = "ja_JP.eucJP"
     ENV["LANGUAGE"] = nil
 
@@ -82,7 +83,7 @@ def test_lang
 
   def test_lang_complex
     ENV["LC_ALL"] = "zh_CN.UTF-8"  # Ignored.
-    ENV["LC_MESSAGES"] = "ko_KR.UTF-8" #Ingored.
+    ENV["LC_CTYPES"] = "ko_KR.UTF-8" #Ingored.
     ENV["LANG"] = "en_US.UTF-8"  # Ignored.
     ENV["LANGUAGE"] ="ja_JP.eucJP:zh_CN.UTF-8"
 

test/test_driver_jruby.rb

@@ -26,7 +26,7 @@ class TestDiverJRuby < Test::Unit::TestCase
 
     def setup
       ENV["LC_ALL"] = nil
-      ENV["LC_MESSAGES"] = nil
+      ENV["LC_CTYPES"] = nil
       ENV["LANG"] = nil
       ENV["LANGUAGE"] = nil
     end

test/test_driver_win32.rb

@@ -6,7 +6,7 @@ class TestDiverWin32 < Test::Unit::TestCase
 
     def setup
       ENV["LC_ALL"] = nil
-      ENV["LC_MESSAGES"] = nil
+      ENV["LC_CTYPES"] = nil
       ENV["LANG"] = nil
       ENV["LANGUAGE"] = nil
       Locale::Driver::Win32.set_thread_locale_id(nil)