Unsupported operand types when the view display doesn't have any arguments

I'm getting a Fatal error: Unsupported operand types in /var/www/honeycore/sites/all/modules/contrib/draggableviews/views/draggableviews_join_handler.inc on line 58 error when displaying the view display that is sorted based on another draggable view.

The line (58) is trying to concatenate the views arguments with the exposed filters. But if the display doesn't have any arguments, it obviously fails because PHP can't add an array to a NULL variable.

My suggestion is to add a fallback that makes sure that the arguments is an empty array if the original arguments are NULL.