BST Traverser Null Initialization - GNU libavl 2.0.2
Author: Ben Pfaff

4.9.3.1 Starting at the Null Node |

The trav_t_init() function just initializes a traverser to the null item, indicated by a null pointer for bst_node.

    64. <BST traverser null initializer 64> =
    void
    bst_t_init (struct bst_traverser *trav, struct bst_table *tree)
    {
      trav->bst_table = tree;
      trav->bst_node = NULL;
      trav->bst_height = 0;
      trav->bst_generation = tree->bst_generation;
    }

This code is included in 63 and 178.