Update upstream source from tag 'upstream/1.9.0+dfsg'

Update to upstream version '1.9.0+dfsg'
with Debian dir 28b8242a05f9ad26cd1cdbcf078be754fc7d6251

1 files changed, 4 insertions, 1 deletions

diff --git a/src/avl.c b/src/avl.c
index 0ea119a7c..a2c6911e7 100644
--- a/src/avl.c
+++ b/src/avl.c
@@ -306,7 +306,10 @@ int avl_walker(avl *node, int (*callback)(void *entry, void *data), void *data)
 }
 
 int avl_traverse(avl_tree *t, int (*callback)(void *entry, void *data), void *data) {
-    return avl_walker(t->root, callback, data);
+    if(t->root)
+        return avl_walker(t->root, callback, data);
+    else
+        return 0;
 }
 
 // ---------------------------