message: Fix crash in GUI when active renderer is not in whitelist
diff: @@ -172,6 +172,15 @@ namespace ospray {
  list.push_back('\0');
  }
  + // add to whitelist if not found
  + if (val == -1) {
  + val = whitelist.size();
  + whitelist.push_back(value);
  + node->setWhiteList(whitelist);
  + list += value;
  + list.push_back('\0');
  + }
  +
  ImGui::Combo(text.c_str(), &val, list.c_str(), whitelist.size());
  node->setValue(whitelist[val]);
  } else {
  