Bug 1432869 - Update usage of cubeb_stream_params to set newly exposed prefs member. r=achronop

The changes to the cubeb API mean that the new prefs member on
cubeb_stream_params should be explicitly set. This changeset does so.

MozReview-Commit-ID: 1hwjLTriaBP

--HG--
extra : rebase_source : f32c4a0a945ed7a048ca40c7286024da1fb93473

dom/media/AudioStream.cpp

@@ -350,6 +350,7 @@ AudioStream::Init(uint32_t aNumChannels, uint32_t aChannelMap, uint32_t aRate)
   params.channels = mOutChannels;
   params.layout = CubebUtils::ConvertChannelMapToCubebLayout(aChannelMap);
   params.format = ToCubebFormat<AUDIO_OUTPUT_FORMAT>::value;
+  params.prefs = CUBEB_STREAM_PREF_NONE;
 
   mAudioClock.Init(aRate);
 

dom/media/GraphDriver.cpp

@@ -627,6 +627,7 @@ AudioCallbackDriver::Init()
 
   output.channels = mOutputChannels;
   output.layout = CubebUtils::GetPreferredChannelLayoutOrSMPTE(cubebContext, mOutputChannels);
+  output.prefs = CUBEB_STREAM_PREF_NONE;
 
   Maybe<uint32_t> latencyPref = CubebUtils::GetCubebMSGLatencyInFrames();
   if (latencyPref) {