message: exitOnCondition should throw an error, not post a status message
diff: @@ -98,8 +98,8 @@ namespace ospray {
  {
  if (!condition)
  return;
  - emitMessage("ERROR", message);
  - exit(1);
  +
  + throw std::runtime_error(message);
  }
  void ManagedObject::warnOnCondition(bool condition,
  