Plane: log the throttle mix for quadplane copter control

ArduPlane/Log.cpp

@@ -502,7 +502,7 @@ const struct LogStructure Plane::log_structure[] = {
     { LOG_STATUS_MSG, sizeof(log_Status),
       "STAT", "QBfBBBBBB",  "TimeUS,isFlying,isFlyProb,Armed,Safety,Crash,Still,Stage,Hit" },
     { LOG_QTUN_MSG, sizeof(QuadPlane::log_QControl_Tuning),
-      "QTUN", "Qffffehhffff", "TimeUS,AngBst,ThrOut,DAlt,Alt,BarAlt,DCRt,CRt,DVx,DVy,DAx,DAy" },
+      "QTUN", "Qffffhhfffff", "TimeUS,AngBst,ThrOut,DAlt,Alt,DCRt,CRt,DVx,DVy,DAx,DAy,TMix" },
 #if OPTFLOW == ENABLED
     { LOG_OPTFLOW_MSG, sizeof(log_Optflow),
       "OF",   "QBffff",   "TimeUS,Qual,flowX,flowY,bodyX,bodyY" },

ArduPlane/quadplane.cpp

@@ -2101,13 +2101,13 @@ void QuadPlane::Log_Write_QControl_Tuning()
         throttle_out        : motors->get_throttle(),
         desired_alt         : pos_control->get_alt_target() / 100.0f,
         inav_alt            : inertial_nav.get_altitude() / 100.0f,
-        baro_alt            : (int32_t)plane.barometer.get_altitude() * 100,
         desired_climb_rate  : (int16_t)pos_control->get_vel_target_z(),
         climb_rate          : (int16_t)inertial_nav.get_velocity_z(),
         dvx                 : desired_velocity.x*0.01f,
         dvy                 : desired_velocity.y*0.01f,
         dax                 : accel_target.x*0.01f,
         day                 : accel_target.y*0.01f,
+        throttle_mix        : attitude_control->get_throttle_mix(),
     };
     plane.DataFlash.WriteBlock(&pkt, sizeof(pkt));
 }

ArduPlane/quadplane.h

@@ -96,13 +96,13 @@ public:
         float    throttle_out;
         float    desired_alt;
         float    inav_alt;
-        int32_t  baro_alt;
         int16_t  desired_climb_rate;
         int16_t  climb_rate;
         float    dvx;
         float    dvy;
         float    dax;
         float    day;
+        float    throttle_mix;
     };
         
 private: