While here: fix the return value of CUPnPService::GetStateVariable (from upstream git commit 171bc8f931dccae64f1f7d43c84a4e8ce0f0dc49)
While here: fix the return value of CUPnPService::GetStateVariable (from upstream git commit 171bc8f931dccae64f1f7d43c84a4e8ce0f0dc49)