libvpx: Pull from upstream

source/libvpx/vp8/decoder/decodeframe.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 83 matching lines @@
     }
 }
 
 static void decode_macroblock(VP8D_COMP *pbi, MACROBLOCKD *xd,
                               unsigned int mb_idx)
 {
     MB_PREDICTION_MODE mode;
     int i;
 #if CONFIG_ERROR_CONCEALMENT
     int corruption_detected = 0;
+#else
+    (void)mb_idx;
 #endif
 
     if (xd->mode_info_context->mbmi.mb_skip_coeff)
     {
         vp8_reset_mb_tokens_context(xd);
     }
     else if (!vp8dx_bool_error(xd->current_bc))
     {
         int eobtotal;
         eobtotal = vp8_decode_mb_tokens(pbi, xd);
@@ skipping 1274 matching lines @@
         FILE *f = fopen("decompressor.VP8", "ab");
         unsigned int size = pbi->bc2.pos + pbi->bc.pos + 8;
         fwrite((void *) &size, 4, 1, f);
         fwrite((void *) pbi->Source, size, 1, f);
         fclose(f);
     }
 #endif
 
     return 0;
 }