fix this little bug
fix this little bug

hnlq715/waf-nginx-module,sdgdsffdsfff/waf-nginx-module,hnlq715/waf-nginx-module,sdgdsffdsfff/waf-nginx-module,changking/waf-nginx-module,sdgdsffdsfff/waf-nginx-module,hnlq715/waf-nginx-module,changking/waf-nginx-module,changking/waf-nginx-module