"You must pass at least entity" exception when users with no permission click "download pdf"

If a user that does not have permission to print an entity, but have access to the content overview page "admin/content" they can still see the download pdf. When they click on it an error is thrown saying: "You must pass at least entity".

to reproduce:
- enable entity_print
- make sure a user does not have permission "Access Printable version of View"
- go to admin/content page
- select a piece of content
- click on download as PDF.

Expected result : " deny access"

Actual result: exception: "You must pass at least entity".

Possible cause
When access is denied $enteties are being passed as an empty array to renderer.

Proposed Solution
Check $entities array is not empty before sending the array to the renderer, patch attached.