Copter: log EKF yaw reset event

ArduCopter/Attitude.cpp

@@ -57,6 +57,7 @@ void Copter::check_ekf_yaw_reset()
     if (new_ekfYawReset_ms != ekfYawReset_ms) {
         attitude_control.shift_ef_yaw_target(ToDeg(yaw_angle_change_rad) * 100.0f);
         ekfYawReset_ms = new_ekfYawReset_ms;
+        Log_Write_Event(DATA_EKF_YAW_RESET);
     }
 }
 

ArduCopter/defines.h

@@ -350,6 +350,7 @@ enum ThrowModeState {
 #define DATA_ROTOR_SPEED_BELOW_CRITICAL     59  // Heli only
 #define DATA_EKF_ALT_RESET                  60
 #define DATA_LAND_CANCELLED_BY_PILOT        61
+#define DATA_EKF_YAW_RESET                  62
 
 // Centi-degrees to radians
 #define DEGX100 5729.57795f