The handling of nil byte slices is different than the handling of other types of nil slices

[aboodman]

type T struct{}
var t1, t2 []T
data, _ = cbor.Marshal(t1)
cbor.Unmarshal(data, &t2)
assert.Nil(t1)  // true
assert.Nil(t2)  // true

var b1, b2 []byte
data, _ := cbor.Marshal(b1)
cbor.Unmarshal(data, &b2)
assert.Nil(b1) // true
assert.Nil(b2) // false

[aboodman]

Note: I actually prefer what it's doing for byte slices for my use case, or alternately making it optional as suggested in #25.

[warpfork]

Was fixed by merging #28 (a while ago).