The dbus_message_iter_init makes a crash if a message(reply) is NULL.
The message(reply) is NULL with following error message.
error message: Did not receive a reply. Possible causes include: the remote
application did not send a reply, the message bus security policy blocked the
reply, the reply timeout expired, or the network connection was broken.
Change-Id: I64c9f468f26299af86ee52dff3714b03112d49e3