CTar::flushBuffer

function flushBuffer()
{
	if (!$str = $this->Buffer)
		return true;
	$this->Buffer = '';

	if ($key = $this->getEncryptKey())
		$str = $this->encrypt($str, $key);

	return $this->gzip ? gzwrite($this->res, $str) : fwrite($this->res, $str);
}