Fix off-by-one error in DCHECK in ProducerFec.

webrtc/modules/rtp_rtcp/source/producer_fec.cc

 /*
  *  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 39 matching lines @@
 RedPacket::RedPacket(size_t length)
     : data_(new uint8_t[length]),
       length_(length),
       header_length_(0) {
 }
 
 void RedPacket::CreateHeader(const uint8_t* rtp_header,
                              size_t header_length,
                              int red_payload_type,
                              int payload_type) {
-  RTC_DCHECK_LT(header_length + kRedForFecHeaderLength, length_);
+  RTC_DCHECK_LE(header_length + kRedForFecHeaderLength, length_);
   memcpy(data_.get(), rtp_header, header_length);
   // Replace payload type.
   data_[1] &= 0x80;
   data_[1] += red_payload_type;
   // Add RED header
   // f-bit always 0
   data_[header_length] = static_cast<uint8_t>(payload_type);
   header_length_ = header_length + kRedForFecHeaderLength;
 }
 
@@ skipping 190 matching lines @@
       fec_->GetNumberOfFecPackets(media_packets_.size(), params_.fec_rate);
   // Return the overhead in Q8.
   return (num_fec_packets << 8) / media_packets_.size();
 }
 
 void ProducerFec::DeleteMediaPackets() {
   media_packets_.clear();
 }
 
 }  // namespace webrtc