PRUint32 index = 0;
PRInt32 index;
nsHTMLSelectElement::SetOptionSelected(nsIDOMHTMLOptionElement* anOption,                                       PRBool aIsSelected){  PRUint32 index = 0;  if (NS_FAILED(GetOptionIndex(anOption, &index))) {    return NS_ERROR_FAILURE;  }  return SetOptionSelectedByIndex(index, aIsSelected);}