OSV-2020-1153 Heap-buffer-overflow in ih264d_cavlc_4x4res_block_totalcoeff_11to16

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=16514 Crash type: Heap-buffer-overflow READ 4 Crash state: ih264dcavlc4x4resblocktotalcoeff11to16 ih264dcavlcparse4x4coeffn0to7 ih264dcavlcparse8x8blockbothavailable...