Hide featured image in post if not pupulated

Hi…

When I have a post with featured image everything is ok, but when the post hasn´t featured image the template charge an empty div, how I can solve this issue?

Thanks a lot for your help,

without featured image: http://prntscr.com/1eczoh //
with Featured image: http://prntscr.com/1eczxr

And this is the code that I´m using in single.php
http://prntscr.com/1ed08l

-jd