fix many compilation warnings about static variables used by non-static functions

[CC] plc_main.c -> plc_main.o
/tmp/be/build/plc_main.c:396:40: warning: ?LogBuff? is static but used in inline function ?copy_from_log? which is not static
memcpy((char*)buf + remaining, LogBuff[level], size - remaining);
^
/tmp/be/build/plc_main.c:395:22: warning: ?LogBuff? is static but used in inline function ?copy_from_log? which is not static
memcpy(buf, &LogBuff[level][buffpos], remaining);
^
...

^
/tmp/be/build/plc_debugger.c:825:20: warning: ?retain_offset? is static but used in inline function ?BufferIterator? which is not static
Retain(retain_offset, size, real_value_p);
^
/tmp/be/build/plc_debugger.c:823:47: warning: ?retain_offset? is static but used in inline function ?BufferIterator? which is not static
unsigned int next_retain_offset = retain_offset + size;
^
^

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import os 

import wx

# Get the default language
langid = wx.LANGUAGE_DEFAULT

# Define locale for wx
locale = wx.Locale(langid)

def GetDomain(path):
    for name in os.listdir(path):
        filepath = os.path.join(path, name)
        basename, fileext = os.path.splitext(name)
        if os.path.isdir(filepath):
            result = GetDomain(filepath)
            if result is not None:
                return result
        elif fileext == ".mo":
            return basename
    return None

def AddCatalog(locale_dir):
    if os.path.exists(locale_dir) and os.path.isdir(locale_dir):
        domain = GetDomain(locale_dir)
        if domain is not None:
            locale.AddCatalogLookupPathPrefix(locale_dir)
            locale.AddCatalog(domain)