From 88d331d5371860216a9ba1d8d30c3add352f36e5 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Fri, 5 Apr 2013 14:48:20 +0200
Subject: [PATCH] bus: when parsing signature strings, accept NULL as empty
 signature

---
 src/libsystemd-bus/bus-message.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/libsystemd-bus/bus-message.c b/src/libsystemd-bus/bus-message.c
index 7acab509793..2d051e8aeb9 100644
--- a/src/libsystemd-bus/bus-message.c
+++ b/src/libsystemd-bus/bus-message.c
@@ -1250,7 +1250,9 @@ int bus_message_append_ap(
         int r;
 
         assert(m);
-        assert(types);
+
+        if (!types)
+                return 0;
 
         for (t = types; *t; t++) {
                 switch (*t) {