message: Fix web build break.
diff: @@ -1060,7 +1060,7 @@ register_vector<std::string>("RegistryKeys");
  class_<MeshReader::MaterialRegistry>("MeshReader$MaterialRegistry")
  .constructor<>()
  - .function("size", &MeshReader::MaterialRegistry::size)
  + .function("size", &MeshReader::MaterialRegistry::numRegistered)
  .function("get", EMBIND_LAMBDA(val, (MeshReader::MaterialRegistry* self, std::string k), {
  const utils::CString name(k.c_str(), k.size());
  auto i = self->getMaterialInstance(name);
  @@ -1076,7 +1076,7 @@ class_<MeshReader::MaterialRegistry>("MeshReader$MaterialRegistry")
  }), allow_raw_pointers())
  .function("keys", EMBIND_LAMBDA(std::vector<std::string>, (MeshReader::MaterialRegistry* self), {
  std::vector<utils::CString> names(self->numRegistered());
  - self->getMaterialNames(names.data());
  + self->getRegisteredMaterialNames(names.data());
  std::vector<std::string> result(self->numRegistered());
  for (const auto& name : names) {
  result.emplace_back(name.c_str());
  