From 9201cb10fe273935bc493eabdd4afa1a72ac240a Mon Sep 17 00:00:00 2001
From: Volker Birk <vb@pep-project.org>
Date: Thu, 28 Mar 2019 13:49:02 +0100
Subject: [PATCH] treat empty list as None

---
 src/user_interface.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/user_interface.cc b/src/user_interface.cc
index 78d37a5..4f678e5 100644
--- a/src/user_interface.cc
+++ b/src/user_interface.cc
@@ -54,7 +54,8 @@ namespace pEp {
         void UserInterface::deliverHandshakeResult(int result, object identities)
         {
             identity_list *shared_identities = nullptr;
-            if (identities != boost::python::api::object()) {
+            if (identities != boost::python::api::object() &&
+                    boost::python::len(identities)) {
                 shared_identities = new_identity_list(nullptr);
                 if (!shared_identities)
                     throw bad_alloc();