RTC_[D]CHECK_op: Remove "u" suffix on integer constants

webrtc/modules/rtp_rtcp/source/rtcp_packet/tmmbn.cc

 /*
  *  Copyright (c) 2016 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 68 matching lines @@
                    size_t max_length,
                    RtcpPacket::PacketReadyCallback* callback) const {
   while (*index + BlockLength() > max_length) {
     if (!OnBufferFull(packet, index, callback))
       return false;
   }
   const size_t index_end = *index + BlockLength();
 
   CreateHeader(kFeedbackMessageType, kPacketType, HeaderLength(), packet,
                index);
-  RTC_DCHECK_EQ(0u, Rtpfb::media_ssrc());
+  RTC_DCHECK_EQ(0, Rtpfb::media_ssrc());
   CreateCommonFeedback(packet + *index);
   *index += kCommonFeedbackLength;
   for (const TmmbItem& item : items_) {
     item.Create(packet + *index);
     *index += TmmbItem::kLength;
   }
   RTC_CHECK_EQ(index_end, *index);
   return true;
 }
 }  // namespace rtcp
 }  // namespace webrtc