Fixed arc flowrate.

Marlin/motion_control.cpp

@@ -123,7 +123,7 @@ void mc_arc(float *position, float *target, float *offset, uint8_t axis_0, uint8
     arc_target[axis_1] = center_axis1 + r_axis1;
     arc_target[axis_linear] += linear_per_segment;
     arc_target[E_AXIS] += extruder_per_segment;
-    plan_buffer_line(arc_target[X_AXIS], arc_target[Y_AXIS], arc_target[Z_AXIS], target[E_AXIS], feed_rate);
+    plan_buffer_line(arc_target[X_AXIS], arc_target[Y_AXIS], arc_target[Z_AXIS], arc_target[E_AXIS], feed_rate);
     
   }
   // Ensure last segment arrives at target location.