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

webrtc/modules/audio_processing/residual_echo_detector.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 112 matching lines @@
     cov.Clear();
   }
   echo_likelihood_ = 0.f;
   next_insertion_index_ = 0;
   reliability_ = 0.f;
 }
 
 void ResidualEchoDetector::PackRenderAudioBuffer(
     AudioBuffer* audio,
     std::vector<float>* packed_buffer) {
-  RTC_DCHECK_GE(160u, audio->num_frames_per_band());
+  RTC_DCHECK_GE(160, audio->num_frames_per_band());
 
   packed_buffer->clear();
   packed_buffer->insert(packed_buffer->end(),
                         audio->split_bands_const_f(0)[kBand0To8kHz],
                         (audio->split_bands_const_f(0)[kBand0To8kHz] +
                          audio->num_frames_per_band()));
 }
 
 }  // namespace webrtc