daemon: prevent empty address crash

Refs #68355

Change-Id: Idce421876028a88dccdc9b8bfdf5c3e638c121af

daemon/src/ip_utils.h

@@ -164,6 +164,8 @@ public:
     }
 
     inline socklen_t getLength() const {
+        if (not *this)
+            return 0;
         return pj_sockaddr_get_len(&addr);
     }