libvpx: Pull from upstream

source/libvpx/vp9/common/vp9_entropymode.c

 /*
  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 435 matching lines @@
   vp9_zero(lf->last_ref_deltas);
   vp9_zero(lf->last_mode_deltas);
   set_default_lf_deltas(lf);
 
   // To force update of the sharpness
   lf->last_sharpness_level = -1;
 
   vp9_default_coef_probs(cm);
   vp9_init_mode_probs(cm->fc);
   vp9_init_mv_probs(cm);
+  cm->fc->initialized = 1;
 
   if (cm->frame_type == KEY_FRAME ||
       cm->error_resilient_mode || cm->reset_frame_context == 3) {
     // Reset all frame contexts.
     for (i = 0; i < FRAME_CONTEXTS; ++i)
       cm->frame_contexts[i] = *cm->fc;
   } else if (cm->reset_frame_context == 2) {
     // Reset only the frame context specified in the frame header.
     cm->frame_contexts[cm->frame_context_idx] = *cm->fc;
   }
 
   // prev_mip will only be allocated in encoder.
   if (frame_is_intra_only(cm) && cm->prev_mip)
     vpx_memset(cm->prev_mip, 0, cm->mi_stride * (cm->mi_rows + 1) *
                                     sizeof(*cm->prev_mip));
 
-  vpx_memset(cm->mip, 0, cm->mi_stride * (cm->mi_rows + 1) * sizeof(*cm->mip));
-
   vp9_zero(cm->ref_frame_sign_bias);
 
   cm->frame_context_idx = 0;
 }