(svn r4105) - Feature: Add proper ISO-8859-15 <> LOCALCODE conversion. As the mess that is makefile can't properly support it at the moment, it is only available for MACOSX. Windows doesn't need FS conversion and I have no idea about OS/2 so it's disabled for them.

- CodeChange: Change the function GetCurrentLocale(). It returns the locale from some default environment-variables, plus a custom one defined as parameter. If all fail, it tries $LANG.

functions.h

@@ -250,6 +250,7 @@ void GameSizeChanged(void);
 bool FileExists(const char *filename);
 bool ReadLanguagePack(int index);
 void InitializeLanguagePacks(void);
+const char *GetCurrentLocale(const char *param);
 void *ReadFileToMem(const char *filename, size_t *lenp, size_t maxsize);
 int GetLanguageList(char **languages, int max);