libvpx: Pull from upstream

source/libvpx/examples/vp8cx_set_ref.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 160 matching lines @@
       ref.frame_type = VP8_LAST_FRAME;
       ref.img = raw;
       if (vpx_codec_control(&codec, VP8_SET_REFERENCE, &ref))
         die_codec(&codec, "Failed to set reference frame");
     }
 
     encode_frame(&codec, &raw, frame_count++, writer);
   }
 
   // Flush encoder.
-  while (encode_frame(&codec, NULL, -1, writer)) {};
+  while (encode_frame(&codec, NULL, -1, writer)) {}
 
   printf("\n");
   fclose(infile);
   printf("Processed %d frames.\n", frame_count);
 
   vpx_img_free(&raw);
   if (vpx_codec_destroy(&codec))
     die_codec(&codec, "Failed to destroy codec.");
 
   vpx_video_writer_close(writer);
 
   return EXIT_SUCCESS;
 }