Fix bitstream error when entropy and adapt_scan on

BUG=aomedia:310

Change-Id: I8e1a1c6d59e3d14ba132d2bbf4e203da26538bde

av1/common/entropy.c

@@ -4035,19 +4035,24 @@ void av1_adapt_coef_probs(AV1_COMMON *cm) {
   for (tx_size = 0; tx_size < TX_SIZES; tx_size++)
     adapt_coef_probs(cm, tx_size, count_sat, update_factor);
 
+#if CONFIG_ENTROPY
+  if (cm->partial_prob_update == 0)
+#endif
+  {
 #if CONFIG_ADAPT_SCAN
-  for (tx_size = 0; tx_size < TX_SIZES_ALL; ++tx_size) {
+    for (tx_size = 0; tx_size < TX_SIZES_ALL; ++tx_size) {
 #if !(CONFIG_VAR_TX || CONFIG_RECT_TX)
-    if (tx_size >= TX_SIZES) continue;
+      if (tx_size >= TX_SIZES) continue;
 #else
-    if (tx_size > TX_32X16) continue;
+      if (tx_size > TX_32X16) continue;
 #endif
-    for (tx_type = DCT_DCT; tx_type < TX_TYPES; ++tx_type) {
-      av1_update_scan_prob(cm, tx_size, tx_type, ADAPT_SCAN_UPDATE_RATE_16);
-      av1_update_scan_order_facade(cm, tx_size, tx_type);
+      for (tx_type = DCT_DCT; tx_type < TX_TYPES; ++tx_type) {
+        av1_update_scan_prob(cm, tx_size, tx_type, ADAPT_SCAN_UPDATE_RATE_16);
+        av1_update_scan_order_facade(cm, tx_size, tx_type);
+      }
     }
-  }
 #endif
+  }
 }
 
 #if CONFIG_ENTROPY