nsresult rv = NS_ERROR_UNEXPECTED;  if (mSelect) { rv = mSelect->SetLength(aLength);
if (!mSelect) { return NS_ERROR_UNEXPECTED;
nsHTMLOptionCollection::SetLength(PRUint32 aLength){  nsresult rv = NS_ERROR_UNEXPECTED;  if (mSelect) {    rv = mSelect->SetLength(aLength);  }  return rv;}