Fix flow

frontend/src/metabase/lib/analytics.js

@@ -25,9 +25,9 @@ const MetabaseAnalytics = {
   // track an event
   trackEvent: function(
     category: string,
-    action?: string,
-    label?: string | number | boolean,
-    value?: number,
+    action?: ?string,
+    label?: ?(string | number | boolean),
+    value?: ?number,
   ) {
     const { tag } = MetabaseSettings.get("version");
 

frontend/src/metabase/visualizations/components/ChartClickActions.jsx

@@ -58,7 +58,7 @@ Object.values(SECTIONS).map((section, index) => {
 });
 
 const getGALabelForAction = action =>
-  `${action.section || ""}:${action.name || ""}`;
+  action ? `${action.section || ""}:${action.name || ""}` : null;
 
 type Props = {
   clicked: ?ClickObject,