fix step motor ctrl bug

components/step_motor_ctrl_module/step_motor_ctrl_module.cpp

@@ -417,7 +417,10 @@ int32_t StepMotorCtrlModule::exec_move_to_zero_task() {
       _motor_move_by(m_param.look_zero_edge_max_d, m_param.look_zero_edge_speed, m_param.acc, m_param.look_zero_edge_dec);
       while (!_motor_is_reach_target()) {
         if (m_thread.getExitFlag()) break;
-        if (!m_Xgpio->getState()) break;
+        if (!m_Xgpio->getState()) {
+          _motor_stop(-1);
+          break;
+        }
         vTaskDelay(1);
       }
     }