Decoder: Initialize slice parameters before concealing error MBs am: 33db7a0f4e am: 129a6006b4
am: fc855de43f

* commit 'fc855de43f785778629a4046aec0036c1c594fc6':
  Decoder: Initialize slice parameters before concealing error MBs

Change-Id: I9ca7fb14c3edbbe68902cbe3b3d75931016e2b9d