ItemList trickyness

[msiebuhr]

Not 100% sure, but this flow seems to break things for me:

data := make([]podio.Item, 0)
var items podio.ItemList
podio.FetchItems(... &items)
for _, item := items.Items {
    data = append(data, item)
}
// data[0].Id = ITEM_0

// Fetch a new batch of data, say at offset 500
podio.FetchItems(... &items)
for _, item := items.Items {
    data = append(data, item)
}
// data[0].Id = ITEM_500
// data[500].Id = ITEM_500

Internally, it shuffles around the pointers in the data-structure handed to it, leading to weird races in parallel process code...