processor->HasStateDependentStyle(data, data->mMedium, &data->mStateful); if (data->mStateful) return PR_FALSE;
PRBool hasStateful; processor->HasStateDependentStyle(data, data->mMedium, &hasStateful); if (hasStateful) { data->mStateful = PR_TRUE;      return PR_FALSE; }
static PRBool SheetHasStatefulStyle(nsISupports* aProcessor, void *aData){  nsIStyleRuleProcessor* processor = (nsIStyleRuleProcessor*)aProcessor;  StatefulData* data = (StatefulData*)aData;  processor->HasStateDependentStyle(data, data->mMedium, &data->mStateful);  if (data->mStateful)    return PR_FALSE;  // stop iteration  return PR_TRUE; // continue}