don't resolve children unnecessarily when listing a sharded directory
don't resolve children unnecessarily when listing a sharded directory

We only need to get the child if it's a shard.

License: MIT
Signed-off-by: Steven Allen <4068f0880b399410602d694b3cc711c8a8f4727e@stebalien.com>

chriscool/go-ipfs,ianopolous/go-ipfs,chriscool/go-ipfs,ianopolous/go-ipfs,chriscool/go-ipfs,Luzifer/go-ipfs,ianopolous/go-ipfs,Luzifer/go-ipfs,Luzifer/go-ipfs