message: Use a variable instead of event object to concatenate candidate attr
diff: @@ -72,15 +72,14 @@ const BaseStack = (specInput) => {
  candidate: 'end',
  };
  } else {
  - if (!candidate.candidate.match(/a=/)) {
  - candidate.candidate = `a=${candidate.candidate}`;
  - }
  -
  candidateObject = {
  sdpMLineIndex: candidate.sdpMLineIndex,
  sdpMid: candidate.sdpMid,
  candidate: candidate.candidate,
  };
  + if (!candidateObject.candidate.match(/a=/)) {
  + candidateObject.candidate = `a=${candidateObject.candidate}`;
  + }
  }
  if (specBase.remoteDescriptionSet) {
  