Sync state_machine_helper_posix to state_machine_helper

state_machine_helper_posix.cpp was out of sync with
state_machine_helper_posix.cpp.

Added debug to detect when sensors is started before uorb.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

src/modules/sensors/sensors_posix.cpp

@@ -2152,6 +2152,10 @@ Sensors::task_main()
 	/* advertise the sensor_combined topic and make the initial publication */
 	_sensor_pub = orb_advertise(ORB_ID(sensor_combined), &raw);
 
+	if (_sensor_pub < 0) {
+		warnx("Sensors::task_main ERROR - uORB not started");
+	}
+
 	/* wakeup source(s) */
 	struct pollfd fds[1];