dedupe: fix bug introduced when converting to use walk.ListR #2902
dedupe: fix bug introduced when converting to use walk.ListR #2902

Before the fix we were only de-duping the ListR batches.

Afterwards we dedupe everything.

This will have the consequence that rclone uses more memory as it will
build a map of all the directory names, not just the names in a given
directory.

B4dM4n/rclone,olihey/rclone,ncw/rclone,olihey/rclone,B4dM4n/rclone,ncw/rclone,B4dM4n/rclone,ncw/rclone,olihey/rclone,ncw/rclone,B4dM4n/rclone,olihey/rclone