libavcodec/proresenc.c:558: error: Uninitialized Value
  The value read from slice_bits[_] was never initialized.

libavcodec/proresenc.c:558:13: 
556.             cur = trellis_node + q;
557. 
558.             bits  = ctx->nodes[prev].bits + slice_bits[q];
                 ^
559.             error = slice_score[q];
560.             if (bits > bits_limit)
