add additional dropsegments test

Marlin/planner.cpp

@@ -554,7 +554,7 @@ void plan_buffer_line(const float &x, const float &y, const float &z, const floa
   delta_mm[Y_AXIS] = (target[Y_AXIS]-position[Y_AXIS])/axis_steps_per_unit[Y_AXIS];
   delta_mm[Z_AXIS] = (target[Z_AXIS]-position[Z_AXIS])/axis_steps_per_unit[Z_AXIS];
   delta_mm[E_AXIS] = ((target[E_AXIS]-position[E_AXIS])/axis_steps_per_unit[E_AXIS])*extrudemultiply/100.0;
-  if ( block->steps_x == 0 && block->steps_y == 0 && block->steps_z == 0 ) {
+  if ( block->steps_x <=dropsegments && block->steps_y <=dropsegments && block->steps_z <=dropsegments ) {
     block->millimeters = fabs(delta_mm[E_AXIS]);
   } else {
     block->millimeters = sqrt(square(delta_mm[X_AXIS]) + square(delta_mm[Y_AXIS]) + square(delta_mm[Z_AXIS]));