don't return null in case it breaks things

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

src/components/structures/UserSettings.js

@@ -863,6 +863,7 @@ module.exports = React.createClass({
                 </div>
             </div>;
         }
+        return <div />;
     },
 
     _renderBulkOptions: function() {