h264dec: check for overflows when calculating allocation size. am: a3dd713
am: d504c68

* commit 'd504c68310bf86e24321a7260c2ecdd9962c8b3b':
  h264dec: check for overflows when calculating allocation size.

Change-Id: Iabbe0fcaf14241d1aa01184c61f1ecb134c16fe8