NS_ENSURE_ARG_POINTER(aLength); *aLength = 0;
NS_PRECONDITION(aLength, "Null aLength!  Prepare to die!");  (void)GetQueryablePropertyMap(aLength);
nsComputedDOMStyle::GetLength(PRUint32* aLength){  NS_ENSURE_ARG_POINTER(aLength);  *aLength = 0;  return NS_OK;}