void log_file_check(LPLOGFILE logfile)
{
	struct stat	sb;
	if(!logfile) // fix
		return;

	// ¨¡AAIAI ¨ú©ªA¢¬©öC¡¤I ¢¥U¨öA ¢¯¡þ¢¥U.
	if (stat(logfile->filename, &sb) != 0 && errno == ENOENT)
	{
		fclose(logfile->fp);
		logfile->fp = fopen(logfile->filename, "a+");
	}
}