Variable existence check

Checks to make sure that oembedData.title even exists within the object; failure to exist results in 'undefined' to be inserted in the link. At least one third party (Flickr) fails to return this object with a title attribute.

Example:
http://www.flickr.com/photos/ahattar/8158065331/lightbox/
Goes to a login page, but an attempt to embed will return a 'success' result without a title object.