* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* -------------------------------------------------------------------------- **
- * Log: ubi_AVLtree.h,v
+ * Log: ubi_AVLtree.h,v
+ * Revision 4.1 1998/05/20 04:35:50 crh
+ * The C file now includes ubi_null.h. See ubi_null.h for more info.
+ *
* Revision 4.0 1998/03/10 03:34:45 crh
* Major changes.
* By adding the AVL balance field to the base ubi_btNode structure, I no