dxva2_h264: pass the correct 8x8 scaling lists

Copy the Inter 8x8 scaling list as second 8x8 matrix into DXVA2's
quantization matrix data structure instead of a potentially unset
Intra chroma scaling matrix.

Fix dxva2 decoding for some H264 samples.
Signed-off-by: Janne Grunau <janne-libav@jannau.net>

libavcodec/dxva2_h264.c

@@ -162,17 +162,19 @@ static void fill_scaling_lists(struct dxva_context *ctx, const H264Context *h, D
             for (j = 0; j < 16; j++)
                 qm->bScalingLists4x4[i][j] = h->pps.scaling_matrix4[i][j];
 
-        for (i = 0; i < 2; i++)
-            for (j = 0; j < 64; j++)
-                qm->bScalingLists8x8[i][j] = h->pps.scaling_matrix8[i][j];
+        for (i = 0; i < 64; i++) {
+            qm->bScalingLists8x8[0][i] = h->pps.scaling_matrix8[0][i];
+            qm->bScalingLists8x8[1][i] = h->pps.scaling_matrix8[3][i];
+        }
     } else {
         for (i = 0; i < 6; i++)
             for (j = 0; j < 16; j++)
                 qm->bScalingLists4x4[i][j] = h->pps.scaling_matrix4[i][zigzag_scan[j]];
 
-        for (i = 0; i < 2; i++)
-            for (j = 0; j < 64; j++)
-                qm->bScalingLists8x8[i][j] = h->pps.scaling_matrix8[i][ff_zigzag_direct[j]];
+        for (i = 0; i < 64; i++) {
+            qm->bScalingLists8x8[0][i] = h->pps.scaling_matrix8[0][ff_zigzag_direct[i]];
+            qm->bScalingLists8x8[1][i] = h->pps.scaling_matrix8[3][ff_zigzag_direct[i]];
+        }
     }
 }