lib: remove entire data tree on yang_dnode_free()

For convenience, make yang_dnode_free() remove the entire data tree and
not only the data node given as a parameter.

Also, add a null-pointer check on nb_config_replace() before calling
yang_dnode_free().

Signed-off-by: Renato Westphal <renato@opensourcerouting.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/yang.c b/lib/yang.c
index 7daef79198..73f63b18e4 100644
--- a/lib/yang.c
+++ b/lib/yang.c
@@ -523,6 +523,8 @@ struct lyd_node *yang_dnode_dup(const struct lyd_node *dnode)
 
 void yang_dnode_free(struct lyd_node *dnode)
 {
+	while (dnode->parent)
+		dnode = dnode->parent;
 	lyd_free_withsiblings(dnode);
 }