fix for voice-only users not appearing in the audio

bigbluebutton-html5/imports/api/users/server/modifiers/addUser.js

@@ -89,8 +89,9 @@ export default function addUser(meetingId, user) {
     ),
   };
 
-  // Only add an empty VoiceUser if there isn't one already. We want to avoid overwriting good data
-  if (!VoiceUsers.findOne({ meetingId, intId: userId })) {
+  // Only add an empty VoiceUser if there isn't one already and if the user coming in isn't a
+  // dial-in user. We want to avoid overwriting good data
+  if (user.clientType !== 'dial-in-user' && !VoiceUsers.findOne({ meetingId, intId: userId })) {
     addVoiceUser(meetingId, {
       voiceUserId: '',
       intId: userId,