Yes, looking at the current [Contacts.webidl][] file, the `photo` property has the type `sequence<Blob>`.  Since `getCurrentPhoto()` returns a single blob, when one is defined, I think we need these two lines.

(Its confusing that when the photo has been removed `getCurrentPhoto()` returns an empty array.)

[Contacts.webidl]: http://hg.mozilla.org/mozilla-central/file/23c23b472a4f/dom/webidl/Contacts.webidl#l80