h264dec: check for overflows when calculating allocation size. am: a3dd713 am: d504c68 am: 9f3762d am: 76f606b am: 9d9ebc9 am: 8e46016
am: 3e1803f

* commit '3e1803fc40052b5cf6f3f7a63aa82bf446749724':
  h264dec: check for overflows when calculating allocation size.

Change-Id: I9cb9096087befb29caab7325fae0f0b9d8e0133d