Deleting pieces: xml_delete

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Deleting a piece out of an XML structure is more than just freeing it; we have to close ranks before and after as well.
  
XMLAPI void xml_delete(XML * piece)
{
   ELEMENTLIST * list;
   if (!piece) return;
   if (piece->parent != NULL) {
      list = piece->parent->children;
      while (list != NULL && list->element != piece) list = list->next;
      if (list != NULL) {
         if (list->next != NULL) list->next->prev = list->prev;
         if (list->prev != NULL) list->prev->next = list->next;
      }
      if (list == piece->parent->children) piece->parent->children = list->next;
      if (list != NULL) FREE ((void *) list);
   }
   xml_free (piece);
}
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