message: Improve unused param message (WARN level, object name)
diff: @@ -46,7 +46,8 @@ namespace ospray {
  {
  for (auto p = params_begin(); p != params_end(); ++p) {
  if (!(*p)->query)
  - postStatusMsg() << "Found unused parameter '" << (*p)->name << "'";
  + postStatusMsg(1) << toString() << ": found unused parameter '"
  + << (*p)->name << "'";
  }
  }
  