[Patch] Take the user environmet language if no previous one selected on UNIX

[howl]

For the English people this doesn't do anything, but I noticed that windows version appeared in my language in first time I ran it on wine, so I wanted the same for the Linux version.

I think the $LANG environment variable is UNIX wide but not sure 100%, anyways if there is no $LANG variable English is assumed, so systems without it stay with the previous behavior:

Index: src/arch/ArchHooks/ArchHooks_Unix.cpp
===================================================================
--- src/arch/ArchHooks/ArchHooks_Unix.cpp (revision 28235)
+++ src/arch/ArchHooks/ArchHooks_Unix.cpp (working copy)
@@ -160,7 +160,17 @@
 
 RString ArchHooks::GetPreferredLanguage()
 {
-	return "en";
+	RString locale;
+
+	if(getenv("LANG"))
+	{
+		locale = getenv("LANG");
+		locale = locale.substr(0,2);
+	}
+	else
+		locale = "en";
+
+	return locale;
 }
 
 void ArchHooks_Unix::Init()

ChangeLog:

David Santamaría Rogado (howl) (1):
      ArchHooks_Unix: Follow user's system language as default.