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

webrtc/voice_engine/test/auto_test/fakes/loudest_filter.cc

Index: webrtc/voice_engine/test/auto_test/fakes/loudest_filter.cc
diff --git a/webrtc/voice_engine/test/auto_test/fakes/loudest_filter.cc b/webrtc/voice_engine/test/auto_test/fakes/loudest_filter.cc
index 1787915356aa434af5a2f13ae59e4556cd90660c..09ca1274c21054bc653e4d0ba64b26f29dd01aff 100644
--- a/webrtc/voice_engine/test/auto_test/fakes/loudest_filter.cc
+++ b/webrtc/voice_engine/test/auto_test/fakes/loudest_filter.cc
@@ -67,7 +67,7 @@ bool LoudestFilter::ForwardThisPacket(const webrtc::RTPHeader& rtp_header) {
   }
 
   unsigned int quietest_ssrc = FindQuietestStream();
-  RTC_CHECK_NE(0u, quietest_ssrc);
+  RTC_CHECK_NE(0, quietest_ssrc);
   // A smaller value if audio level corresponds to a louder sound.
   if (audio_level < stream_levels_[quietest_ssrc].audio_level) {
     stream_levels_.erase(quietest_ssrc);