Merge pull request #4552 from matrix-org/foldleft/fix-sublist-crash

Fix a crash where a name could unexpectedly be an empty list

src/components/views/rooms/RoomTile.js

@@ -432,10 +432,9 @@ export default createReactClass({
         });
 
         let name = this.state.roomName;
-        if (name == undefined || name == null) name = '';
+        if (typeof name !== 'string') name = '';
         name = name.replace(":", ":\u200b"); // add a zero-width space to allow linewrapping after the colon
 
-
         let badge;
         if (badges) {
             const limitedCount = FormattingUtils.formatCount(notificationCount);