fix UBSAN warning
"applying non-zero offset 2044 to null pointer"
Fixes chromium bug
@@ -732,7 +732,7 @@ static int AllocateMemory(VP8Decoder* const dec) {
mem += f_info_size;
dec->thread_ctx_.id_ = 0;
dec->thread_ctx_.f_info_ = dec->f_info_;
- if (dec->mt_method_ > 0) {
+ if (dec->filter_type_ > 0 && dec->mt_method_ > 0) {
// secondary cache line. The deblocking process need to make use of the
// filtering strength from previous macroblock row, while the new ones
// are being decoded in parallel. We'll just swap the pointers.
