[master] 4c8fb8628 vtree: Finish NFIND constification

[Dridi Boukelmoune]

commit 4c8fb86287a0e9c9ebe066bc5e69b586f39bcb39
Author: Dridi Boukelmoune <dridi.boukelmoune at gmail.com>
Date:   Thu Apr 17 16:14:28 2025 +0200

    vtree: Finish NFIND constification
    
    Spotted by Nils.
    
    Refs 956d529fb8236596e3bd2c01e78e4dac9ec13b27

diff --git a/include/vtree.h b/include/vtree.h
index 2d9cdf9cd..7296b48d6 100644
--- a/include/vtree.h
+++ b/include/vtree.h
@@ -885,7 +885,7 @@ name##_VRBT_FIND(const struct name *head, const struct type *elm)			\
 #define VRBT_GENERATE_NFIND(name, type, field, cmp, attr)			\
 /* Finds the first node greater than or equal to the search key */	\
 attr struct type *							\
-name##_VRBT_NFIND(struct name *head, struct type *elm)			\
+name##_VRBT_NFIND(const struct name *head, const struct type *elm)			\
 {									\
 	struct type *tmp = VRBT_ROOT(head);				\
 	struct type *res = NULL;					\