Misc. small cleanups

webrtc/modules/audio_processing/noise_suppression_impl.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 147 matching lines @@
 }
 
 float NoiseSuppressionImpl::speech_probability() const {
   rtc::CritScope cs(crit_);
 #if defined(WEBRTC_NS_FLOAT)
   float probability_average = 0.0f;
   for (auto& suppressor : suppressors_) {
     probability_average +=
         WebRtcNs_prior_speech_probability(suppressor->state());
   }
-  if (suppressors_.size() > 0) {
+  if (!suppressors_.empty()) {
     probability_average /= suppressors_.size();
   }
   return probability_average;
 #elif defined(WEBRTC_NS_FIXED)
   // TODO(peah): Returning error code as a float! Remove this.
   // Currently not available for the fixed point implementation.
   return AudioProcessing::kUnsupportedFunctionError;
 #endif
 }
 }  // namespace webrtc