init contact_mail and contact_name

app/src/messages.py

@@ -84,6 +84,8 @@ class Message(metaclass=IterRegistry):
         self.node_id = ''
         self.sug_area = ''
         self.id_str = id_str
+        self.contact_name = b''
+        self.contact_mail = b''
         self._recv_buffer = b''
         self._send_buffer = bytearray(0)
         self._forward_buffer = bytearray(0)