dropbox/dbhash: fix errcheck warning
dropbox/dbhash: fix errcheck warning

olihey/rclone,seuffert/rclone,ncw/rclone,B4dM4n/rclone,ncw/rclone,seuffert/rclone,seuffert/rclone,B4dM4n/rclone,yonjah/rclone,olihey/rclone,ncw/rclone,olihey/rclone,olihey/rclone,ncw/rclone,B4dM4n/rclone,yonjah/rclone,seuffert/rclone,B4dM4n/rclone,yonjah/rclone,yonjah/rclone