Merge pull request #66 from CloudWise-Lukemiao/grafana_plugin_1218

Fixed the issue of displaying 0 when the number is null
diff --git a/grafana_plugin/apache-iotdb-datasource.zip b/grafana_plugin/apache-iotdb-datasource.zip
index ba61e94..0d71e85 100644
--- a/grafana_plugin/apache-iotdb-datasource.zip
+++ b/grafana_plugin/apache-iotdb-datasource.zip
Binary files differ