Php error

Hi,

with php 7.2 I have this error:

PHP Warning: Declaration of JemViewVenue::display() should be compatible with Joomla\CMS\MVC\View\HtmlView::display($tpl = NULL) in /components/com_jem/views/venue/view.feed.php on line 15

Some solution?
Thanks

Joomla 3.8.12 and Jem 2.2.3

go to <joomlaroot>/components/com_jem/views/venue/view.feed.php and add "$tpl = null" (without ") to the display() function. it should look like: public function display($tpl = null)
The same do in the file yjoomlaroot>/components/category/view.feed.php. I think someone forgot to fix those both files.

Edit: And thats not an error, thats a warning

@Egnarts: if you are on a php less than 7.2 and you have changed these files like that, is there a warning?
Can we officially change that in the official package without problems?

I just tried that it works, I did not see the warning in my websites and did not checked if the warning is away.
I hoped giampus will give us feedback. But if you look in the other view.xxx.php files, the display() function always has something like that as parameter. So I think hoffi just forgot those two files.