FIX: TagsHtmlCallback params can be undefined (#174)

FIX: TagsHtmlCallback params can be undefined (#174)

diff --git a/assets/javascripts/discourse-assign/initializers/extend-for-assigns.js.es6 b/assets/javascripts/discourse-assign/initializers/extend-for-assigns.js.es6
index 544e8f1..c85608b 100644
--- a/assets/javascripts/discourse-assign/initializers/extend-for-assigns.js.es6
+++ b/assets/javascripts/discourse-assign/initializers/extend-for-assigns.js.es6
@@ -231,7 +231,7 @@ function initialize(api) {
 
   api.addDiscoveryQueryParam("assigned", { replace: true, refreshModel: true });
 
-  api.addTagsHtmlCallback((topic, params) => {
+  api.addTagsHtmlCallback((topic, params = {}) => {
     const assignedTo = topic.get("assigned_to_user.username");
     if (assignedTo) {
       const assignedPath = topic.assignedToUserPath;

GitHub sha: dfb30fc10416555627b74b7aacf08bba55e14a81

This commit appears in #174 which was approved by eviltrout. It was merged by CvX.