Merge commit 'c442190a6bfd8036f6c32b78e1e96ff3b830f8f0'

* commit 'c442190a6bfd8036f6c32b78e1e96ff3b830f8f0':
  error_resilience: initialize prev_* variables

Note, these variables are not used without initialization prior
to the change

Merged-by: Michael Niedermayer <michaelni@gmx.at>

diff --cc libavcodec/error_resilience.c
Simple merge