StepperMotor typo, angle instead velocity

Author: askuric

src/StepperMotor.cpp

@@ -308,7 +308,7 @@ void StepperMotor::move(float new_target) {
       shaft_angle_sp = target;
       // calculate velocity set point
       shaft_velocity_sp = feed_forward_velocity + P_angle( shaft_angle_sp - shaft_angle );
-      shaft_angle_sp = _constrain(shaft_angle_sp, -velocity_limit, velocity_limit);
+      shaft_velocity_sp = _constrain(shaft_velocity_sp, -velocity_limit, velocity_limit);
       // calculate the torque command
       current_sp = PID_velocity(shaft_velocity_sp - shaft_velocity); // if voltage torque control
       // if torque controlled through voltage
@@ -440,4 +440,4 @@ float StepperMotor::angleOpenloop(float target_angle){
   open_loop_timestamp = now_us;
 
   return Uq;
-}
+}