Coverity: Initialize member variables.

media/audio/mac/audio_low_latency_output_mac.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/audio/mac/audio_low_latency_output_mac.h"
 
 #include <CoreServices/CoreServices.h>
 
 #include "base/basictypes.h"
 #include "base/logging.h"
@@ skipping 29 matching lines @@
   // packet is always one frame.
   format_.mSampleRate = params.sample_rate;
   format_.mFormatID = kAudioFormatLinearPCM;
   format_.mFormatFlags = kLinearPCMFormatFlagIsPacked |
                          kLinearPCMFormatFlagIsSignedInteger;
   format_.mBitsPerChannel = params.bits_per_sample;
   format_.mChannelsPerFrame = params.channels;
   format_.mFramesPerPacket = 1;
   format_.mBytesPerPacket = (format_.mBitsPerChannel * params.channels) / 8;
   format_.mBytesPerFrame = format_.mBytesPerPacket;
+  format_.mReserved = 0;
 
   // Calculate the number of sample frames per callback.
   number_of_frames_ = params.GetPacketSize() / format_.mBytesPerPacket;
 }
 
 AUAudioOutputStream::~AUAudioOutputStream() {
 }
 
 bool AUAudioOutputStream::Open() {
   // Open and initialize the DefaultOutputUnit.
@@ skipping 178 matching lines @@
                                       0,
                                       0,
                                       &info_size,
                                       &nominal_sample_rate);
   DCHECK_EQ(result, 0);
   if (result)
     return 0.0;  // error
 
   return nominal_sample_rate;
 }