h264dec: check for overflows when calculating allocation size. am: a3dd713 am: d504c68 am: 9f3762d
am: 76f606b

* commit '76f606bdf9d52a4406dc285e06a0f15b13903bac':
  h264dec: check for overflows when calculating allocation size.

Change-Id: I1ae828ed17ca9df7b3097cdb1acaf06e0202321d