Don't NPE on command line parse failure.

            } else if (opt.equals("--receiver-permission")) {

                mReceiverPermission = nextArgRequired();

            } else {

                System.err.println("Error: Unknown option: " + opt);

                return null;

                throw new IllegalArgumentException("Unknown option: " + opt);

            }

        }

        intent.setDataAndType(data, type);