[lasem] dom_node: check the validity of the new child parameter.

[Emmanuel Pacaud <emmanuel src gnome org>]

commit 621693c7805ecffe45db532b76eb81a33f2f4a1e
Author: Emmanuel Pacaud <emmanuel gnome org>
Date:   Wed Dec 1 22:09:20 2010 +0100

    dom_node: check the validity of the new child parameter.

 src/lsmdomnode.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/lsmdomnode.c b/src/lsmdomnode.c
index 20f7451..d2441ed 100644
--- a/src/lsmdomnode.c
+++ b/src/lsmdomnode.c
@@ -421,6 +421,7 @@ lsm_dom_node_append_child (LsmDomNode* self, LsmDomNode* new_child)
 	LsmDomNodeClass *node_class;
 
 	g_return_val_if_fail (LSM_IS_DOM_NODE (self), NULL);
+	g_return_val_if_fail (LSM_IS_DOM_NODE (new_child), NULL);
 	g_return_val_if_fail (new_child->parent_node == NULL, NULL);
 
 	if (!LSM_DOM_NODE_GET_CLASS (self)->can_append_child (self, new_child)) {