Outbound links tracking

I have enabled track outbound links.
It seems to work well with text-links. But with links containing only an image / banner I end up with this:
onclick=”__gaTracker(‘send’, ‘event’, ‘outbound-article’, ‘http://example.com’, ”);

Note the last empty ”.

//Sam

https://ww.wp.xz.cn/plugins/google-analytics-for-wordpress/