message: check http prox port null
diff: @@ -661,6 +661,10 @@ void php_swoole_client_check_setting(swClient *cli, zval *zset TSRMLS_DC)
  cli->http_proxy->proxy_host = strdup(host);
  cli->http_proxy->proxy_port = Z_LVAL_P(v);
  }
  + else
  + {
  + swSysError("http_proxy_port can not be null");
  + }
  }
  #ifdef SW_USE_OPENSSL
  if (cli->open_ssl)
  