Trying to backup file with empty filename

Please add a check on $original_file in class.backup.php before the copy operation to backup file, because sometime $original_file comes up empty and copy operation fails with a warning in the log file.

I’ve temporary fixed it with this on line 218:

if (!empty(basename( $original_file ))){
				$backup_file = $backup_dir . basename( $original_file );
				$copy = copy( $original_file, $backup_file );
			}