Reset the txfm context to match block size when skip flag is on

Reset the transform block size context to the actual block size
if the skip flag is turned on.

Change-Id: I821afac2dcd4c3a17389e9954b7b2575f87d07d7
diff --git a/av1/decoder/decodemv.c b/av1/decoder/decodemv.c
index a318c2f..c70daa7 100644
--- a/av1/decoder/decodemv.c
+++ b/av1/decoder/decodemv.c
@@ -1886,7 +1886,7 @@
             mbmi->inter_tx_size[idy >> 1][idx >> 1] = mbmi->tx_size;
       }
       mbmi->min_tx_size = get_min_tx_size(mbmi->tx_size);
-      set_txfm_ctxs(mbmi->tx_size, xd->n8_w, xd->n8_h, xd);
+      set_txfm_ctxs(mbmi->tx_size, xd->n8_w, xd->n8_h, mbmi->skip, xd);
     }
 #else
   if (inter_block)