Changed !(x==y) to (x!=y). Unadvertise when a different control group…

… is published.

src/modules/mavlink/mavlink_receiver.cpp

@@ -1057,11 +1057,14 @@ MavlinkReceiver::handle_message_set_actuator_control_target(mavlink_message_t *m
 			actuator_controls.timestamp = hrt_absolute_time();
 			uint8_t control_group           = set_actuator_control_target.group_mlx;
 			static int8_t control_group_previous = -1;
-			/* Set duty cycles for the servos in actuator_controls_0 */
+
 			memcpy(actuator_controls.control, set_actuator_control_target.controls, 8 * sizeof(float));
 
 			/* Reset orb advertising when current control group is unequal to the previous control group */
-			if (!(control_group == control_group_previous)) {
+			if (control_group != control_group_previous) {
+
+				orb_unadvertise(_actuator_controls_pub);
+
 				_actuator_controls_pub = nullptr;
 			}