libvpx: Pull from upstream

source/libvpx/examples/vp9_spatial_svc_encoder.c

 /*
  *  Copyright (c) 2012 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 98 matching lines @@
   uint32_t frames_to_code;
   uint32_t frames_to_skip;
   struct VpxInputContext input_ctx;
   stats_io_t rc_stats;
   int passes;
   int pass;
 } AppInput;
 
 static const char *exec_name;
 
-void usage_exit() {
+void usage_exit(void) {
   fprintf(stderr, "Usage: %s <options> input_filename output_filename\n",
           exec_name);
   fprintf(stderr, "Options:\n");
   arg_show_usage(stderr, svc_args);
   exit(EXIT_FAILURE);
 }
 
 static void parse_command_line(int argc, const char **argv_,
                                AppInput *app_input, SvcContext *svc_ctx,
                                vpx_codec_enc_cfg_t *enc_cfg) {
@@ skipping 309 matching lines @@
 
   vpx_img_free(&raw);
 
   // display average size, psnr
   printf("%s", vpx_svc_dump_statistics(&svc_ctx));
 
   vpx_svc_release(&svc_ctx);
 
   return EXIT_SUCCESS;
 }