if (!mAttachedQueue) NS_NewISupportsArray(getter_AddRefs(mAttachedQueue));
if (!mAttachedStack.AppendElement(aBinding)) return NS_ERROR_OUT_OF_MEMORY;
nsBindingManager::AddToAttachedQueue(nsIXBLBinding* aBinding){  if (!mAttachedQueue)    NS_NewISupportsArray(getter_AddRefs(mAttachedQueue)); // This call addrefs the array.  mAttachedQueue->AppendElement(aBinding);  return NS_OK;}