Revert "Use global position altitude to report HUD altitude, for consistency."

src/modules/mavlink/mavlink_messages.cpp

@@ -820,11 +820,7 @@ protected:
 			msg.groundspeed = sqrtf(pos.vel_n * pos.vel_n + pos.vel_e * pos.vel_e);
 			msg.heading = _wrap_2pi(att.yaw) * M_RAD_TO_DEG_F;
 			msg.throttle = armed.armed ? act.control[3] * 100.0f : 0.0f;
-			/*
-			Do not use sensor_combined.baro_alt_meter here because 
-			it is mismatched with WSG84 AMSL used elsewhere for reporting altitude.
-			*/
-			msg.alt = pos.alt;
+			msg.alt = sensor_combined.baro_alt_meter;
 			msg.climb = -pos.vel_d;
 
 			_mavlink->send_message(MAVLINK_MSG_ID_VFR_HUD, &msg);