[aravis/dom] gc: prevent a crash when looking for a node with name=NULL.

[Emmanuel Pacaud <emmanuel src gnome org>]

commit 67fa6da775517b56011b5bc9f7a3f02ba28ddfdf
Author: Emmanuel Pacaud <emmanuel gnome org>
Date:   Thu Mar 1 10:51:37 2012 +0100

    gc: prevent a crash when looking for a node with name=NULL.

 src/arvgc.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/arvgc.c b/src/arvgc.c
index 79e3978..b61b3fc 100644
--- a/src/arvgc.c
+++ b/src/arvgc.c
@@ -138,6 +138,7 @@ ArvGcNode *
 arv_gc_get_node	(ArvGc *genicam, const char *name)
 {
 	g_return_val_if_fail (ARV_IS_GC (genicam), NULL);
+	g_return_val_if_fail (name != NULL, NULL);
 
 	return g_hash_table_lookup (genicam->nodes, name);
 }