libvpx: Pull from upstream

source/libvpx/vp8/encoder/ratectrl.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 1583 matching lines @@
       // Drop this frame: advance frame counters, and set force_maxqp flag.
       cpi->common.current_video_frame++;
       cpi->frames_since_key++;
       // Flag to indicate we will force next frame to be encoded at max QP.
       cpi->force_maxqp = 1;
       return 1;
     } else {
       cpi->force_maxqp = 0;
       return 0;
     }
+    cpi->force_maxqp = 0;
     return 0;
   }
+  cpi->force_maxqp = 0;
   return 0;
 }