关键路径中的小代码改进 #1047

void probe_state_monitor()
        {
          if (probe_get_state()) {
            sys_probe_state = PROBE_OFF;
            memcpy(sys_probe_position, sys_position, sizeof(sys_position));
            bit_true(sys_rt_exec_state, EXEC_MOTION_CANCEL);
          }
        }

  if (sys_probe_state == PROBE_ACTIVE)
	  probe_state_monitor();