Fix null-pointer dereference in RTPSenderVideo.

webrtc/modules/rtp_rtcp/source/rtp_sender_video.h

 /*
  *  Copyright (c) 2012 The WebRTC 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 34 matching lines @@
       const uint32_t maxBitRate);
 
   int32_t SendVideo(const RtpVideoCodecTypes videoType,
                     const FrameType frameType,
                     const int8_t payloadType,
                     const uint32_t captureTimeStamp,
                     int64_t capture_time_ms,
                     const uint8_t* payloadData,
                     const size_t payloadSize,
                     const RTPFragmentationHeader* fragmentation,
-                    const RTPVideoHeader* rtpHdr);
+                    const RTPVideoHeader* video_header);
 
   int32_t SendRTPIntraRequest();
 
   void SetVideoCodecType(RtpVideoCodecTypes type);
 
   void SetMaxConfiguredBitrateVideo(const uint32_t maxBitrate);
 
   uint32_t MaxConfiguredBitrateVideo() const;
 
   // FEC
@@ skipping 54 matching lines @@
 
   // Bitrate used for FEC payload, RED headers, RTP headers for FEC packets
   // and any padding overhead.
   Bitrate _fecOverheadRate;
   // Bitrate used for video payload and RTP headers
   Bitrate _videoBitrate;
 };
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTP_SENDER_VIDEO_H_