am 89c76843: Merge change I9b771df3 into eclair

Merge commit '89c768435fc48a93c0af97f9f08e57a346b0a9fd' into eclair-mr2

* commit '89c768435fc48a93c0af97f9f08e57a346b0a9fd':
  Make sure AsyncTask sens a null result to onPostExecute() when cancelled.