Fix errors caused by checklist items activities.

Thanks to GhassenRjab and nztqa ! Closes #1198

CHANGELOG.md

@@ -1,8 +1,17 @@
+# Upcoming Wekan release
+
+This release fixes the following bugs:
+
+* [Fix errors caused by checklist items activities](https://github.com/wekan/wekan/pull/1200).
+
+Thanks to GitHub users GhassenRjab and nztqa for contributions.
+
 # v0.34 2017-08-30 Wekan release
 
 This release adds the following new features:
 
-* [Import Trello and Wekan board times of creation of activities](https://github.com/wekan/wekan/pull/1187).
+* [Import Trello and Wekan board times of creation of activities](https://github.com/wekan/wekan/pull/1187);
+* Newest Wekan is available at Sandstorm App Market.
 
 Known issues: