[gimp/gimp-2-8] Bug 675554 - fix overriden language environment variables on Windows.

[Jehan Pagès <jehanp src gnome org>]

commit 1c44eae8c81902e53b62e1704dbbda07533f4545
Author: Jehan <jehan girinstud io>
Date:   Tue Oct 8 00:17:56 2013 +1300

    Bug 675554 - fix overriden language environment variables on Windows.
    
    If any of the locale environment variables used for UI language is set
    (LANGUAGE, LC_ALL, LC_MESSAGES and LANG), do not let Windows' default UI
    language override these.
    Language set in GIMP preferences still have higher priority.
    (cherry picked from commit fe481275e2e42a937618366d18cd6aa03bec3b59)

 app/language.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/app/language.c b/app/language.c
index 6fc4a3c..caa1412 100644
--- a/app/language.c
+++ b/app/language.c
@@ -37,7 +37,11 @@ void
 language_init (const gchar *language)
 {
 #ifdef G_OS_WIN32
-  if (! language)
+  if (! language                       &&
+      g_getenv ("LANG")        == NULL &&
+      g_getenv ("LC_MESSAGES") == NULL &&
+      g_getenv ("LC_ALL")      == NULL &&
+      g_getenv ("LANGUAGE")    == NULL)
     {
       /* FIXME: This is a hack. gettext doesn't pick the right language
        * by default on Windows, so we enforce the right one. The