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

webrtc/common_audio/include/audio_util.h

 /*
  *  Copyright (c) 2013 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 136 matching lines @@
 }
 
 // Downmixes an interleaved multichannel signal to a single channel by averaging
 // all channels.
 template <typename T, typename Intermediate>
 void DownmixInterleavedToMonoImpl(const T* interleaved,
                                   size_t num_frames,
                                   int num_channels,
                                   T* deinterleaved) {
   RTC_DCHECK_GT(num_channels, 0);
-  RTC_DCHECK_GT(num_frames, 0u);
+  RTC_DCHECK_GT(num_frames, 0);
 
   const T* const end = interleaved + num_frames * num_channels;
 
   while (interleaved < end) {
     const T* const frame_end = interleaved + num_channels;
 
     Intermediate value = *interleaved++;
     while (interleaved < frame_end) {
       value += *interleaved++;
     }
@@ skipping 10 matching lines @@
 
 template <>
 void DownmixInterleavedToMono<int16_t>(const int16_t* interleaved,
                                        size_t num_frames,
                                        int num_channels,
                                        int16_t* deinterleaved);
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_COMMON_AUDIO_INCLUDE_AUDIO_UTIL_H_