Bug 1365090: clear RID vector when reconfiguring send media codec. r=jesup

MozReview-Commit-ID: Bs5Cihjt8fV

--HG--
extra : rebase_source : 0e423cdf7b82ecca29aecc2c72601005b56786cd

media/webrtc/signaling/src/media-conduit/VideoConduit.cpp

@@ -501,6 +501,7 @@ WebrtcVideoConduit::ConfigureSendMediaCodec(const VideoCodecConfig* codecConfig)
 
   mSendingFramerate = 0;
   mEncoderConfig.ClearStreams();
+  mSendStreamConfig.rtp.rids.clear();
 
   unsigned short width = 320;
   unsigned short height = 240;