Merge pull request #5274 from Sebastianv650/improve_smooth_moves

Improvement for ENSURE_SMOOTH_MOVES

Marlin/stepper.cpp

@@ -1072,6 +1072,9 @@ void Stepper::finish_and_disable() {
 
 void Stepper::quick_stop() {
   cleaning_buffer_counter = 5000;
+  #if ENABLED(ENSURE_SMOOTH_MOVES)
+    planner.clear_block_buffer_runtime();
+  #endif
   DISABLE_STEPPER_DRIVER_INTERRUPT();
   while (planner.blocks_queued()) planner.discard_current_block();
   current_block = NULL;