+ * Revision 1.13 1997-12-12 06:33:58 adam
+ * Fixed bug that showed up when multiple filter where used.
+ * Made one routine thread-safe.
+ *
+ * Revision 1.12 1997/11/18 10:03:24 adam
+ * Member num_children removed from data1_node.
+ *
+ * Revision 1.11 1997/11/06 11:41:01 adam