Heli: Prevent loss of yaw control during large angle recovery

libraries/AC_AttitudeControl/AC_AttitudeControl_Heli.cpp

@@ -358,7 +358,7 @@ float AC_AttitudeControl_Heli::rate_target_to_motor_yaw(float rate_yaw_actual_ra
     float pid = _pid_rate_yaw.update_all(rate_target_rads, rate_yaw_actual_rads, _flags_heli.limit_yaw) + _actuator_sysid.z;
 
     // use pid library to calculate ff
-    float vff = _pid_rate_yaw.get_ff();
+    float vff = _pid_rate_yaw.get_ff()*_feedforward_scalar;
 
     // add feed forward
     float yaw_out = pid + vff;