Check for empty username in a groupchat

src/group.cpp

@@ -93,6 +93,8 @@ void Group::regeneratePeerList()
 
         QString toxid = id.publicKey;
         toxids[toxid] = peers[i];
+        if (toxids[toxid].isEmpty())
+            toxids[toxid] = tr("<Empty>", "Placeholder when someone's name in a group chat is empty");
 
         Friend *f = FriendList::findFriend(id);
         if (f != nullptr && f->hasAlias())

src/widget/widget.cpp

@@ -1480,6 +1480,9 @@ void Widget::onGroupNamelistChanged(int groupnumber, int peernumber, uint8_t Cha
     else if (change == TOX_CHAT_CHANGE_PEER_NAME) // core overwrites old name before telling us it changed...
     {
         QString name = Nexus::getCore()->getGroupPeerName(groupnumber, peernumber);
+        if (name.isEmpty())
+            name = tr("<Empty>", "Placeholder when someone's name in a group chat is empty");
+
         g->updatePeer(peernumber, name);
     }
 }