rbtree: drop "const" from search function

Having the search argument and result be "const" is nice in theory,
but causes problems in practice.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/rbtree.c b/rbtree.c
index 7e13bffb..618b4f8d 100644
--- a/rbtree.c
+++ b/rbtree.c
@@ -12,9 +12,9 @@
 
 #include "rbtree.h"
 
-const struct rbtree *rb_search(const struct rbtree *tree, uint64_t key)
+struct rbtree *rb_search(struct rbtree *tree, uint64_t key)
 {
-    const struct rbtree *best = NULL;
+    struct rbtree *best = NULL;
 
     while (tree) {
 	if (tree->key == key)