Fix avatar not being set for some rooms in the top bar

src/ChatPage.cpp

@@ -717,11 +717,8 @@ ChatPage::changeTopRoomInfo(const QString &room_id)
                 top_bar_->updateRoomName(name);
                 top_bar_->updateRoomTopic(QString::fromStdString(room_info[room_id].topic));
 
-                auto img = cache::getRoomAvatar(room_id);
-
-                if (img.isNull())
                 top_bar_->updateRoomAvatarFromName(name);
-                else
+                if (!avatar_url.isEmpty())
                         top_bar_->updateRoomAvatar(avatar_url);
 
         } catch (const lmdb::error &e) {