mod: TestDagSync, seek before reading

[schomatis]

No description provided.

[schomatis]

Why was this not failing before? In the current implementation seeking to the end of the file (conveniently) leaves us at the beginning.. (hopefully that will be corrected in #12)

go-unixfs/io/pbdagreader.go

Lines 275 to 282 in 88f9765

	for i := 0; i < dr.file.NumChildren(); i++ {
	if dr.file.BlockSize(i) > uint64(left) {
	dr.linkPosition = i
	break
	} else {
	left -= int64(dr.file.BlockSize(i))
	}
	}