libvpx: Pull from upstream

source/libvpx/examples/decode_to_md5.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 53 matching lines @@
 
 static void print_md5(FILE *stream, unsigned char digest[16]) {
   int i;
 
   for (i = 0; i < 16; ++i)
     fprintf(stream, "%02x", digest[i]);
 }
 
 static const char *exec_name;
 
-void usage_exit() {
+void usage_exit(void) {
   fprintf(stderr, "Usage: %s <infile> <outfile>\n", exec_name);
   exit(EXIT_FAILURE);
 }
 
 int main(int argc, char **argv) {
   int frame_cnt = 0;
   FILE *outfile = NULL;
   vpx_codec_ctx_t codec;
   VpxVideoReader *reader = NULL;
   const VpxVideoInfo *info = NULL;
@@ skipping 43 matching lines @@
 
   printf("Processed %d frames.\n", frame_cnt);
   if (vpx_codec_destroy(&codec))
     die_codec(&codec, "Failed to destroy codec.");
 
   vpx_video_reader_close(reader);
 
   fclose(outfile);
   return EXIT_SUCCESS;
 }