Decoder: Initialize slice parameters before concealing error MBs am: 33db7a0f4e am: 129a6006b4 am: fc855de43f
am: 634b546f34

* commit '634b546f3494de42c4d94370fa7b36b2763087b1':
  Decoder: Initialize slice parameters before concealing error MBs

Change-Id: I9b919624c7914e7e8ef4607dd7bd5a763eff3e0f