matthiasbeyer/libreset — pull request #260 by neithernut (2014-09-26 22:34:58+00:00)
Title: Modify avl_find to return a pointer to a pointer

This PR modifies `avl_find()`. While previously it returned a pointer to a node or NULL, now it will return a two-level pointer.
This is a prequisite to my work on the `avl_union()` algorithm.