nsCOMPtr<nsIPresContext> pc(do_QueryInterface(aContext));  NS_ASSERTION(pc, "not a pres context!");  return mFrame->OnStopDecode(aRequest, pc, status, statusArg);
return mFrame->OnStopDecode(aRequest, status, statusArg);
NS_IMETHODIMP nsBulletListener::OnStopDecode(imgIRequest *aRequest, nsISupports *aContext, nsresult status, const PRUnichar *statusArg){  if (!mFrame)    return NS_ERROR_FAILURE;  nsCOMPtr<nsIPresContext> pc(do_QueryInterface(aContext));  NS_ASSERTION(pc, "not a pres context!");  return mFrame->OnStopDecode(aRequest, pc, status, statusArg);}