message: add templatized getParam for ManagedObjects
diff: @@ -47,6 +47,12 @@ namespace ospray {
  void *getIE() const;
  + template <typename T>
  + T getParam(const char *name, T valIfNotFound=T())
  + {
  + return ParameterizedObject::getParam<T>(name, valIfNotFound);
  + }
  +
  ManagedObject *getParamObject(const char *name,
  ManagedObject *valIfNotFound = nullptr);
  