libavcodec/dvdec.c:332: error: Uninitialized Value
  The value read from is_field_mode[_] was never initialized.

libavcodec/dvdec.c:332:17: 
330.                 y_stride = (mb_y == 134) ? (1 << log2_blocksize) :
331.                            s->frame->linesize[j] << ((!is_field_mode[mb_index]) * log2_blocksize);
332.                 linesize = s->frame->linesize[j] << is_field_mode[mb_index];
                     ^
333.                 (mb++)->idct_put(c_ptr, linesize, block);
334.                 block += 64;
