Review fix

Signed-off-by: Janusz Lisiecki <[email protected]>

Author: JanuszL

dali/operators/video/legacy/reader/nvdecoder/nvdecoder.cc

@@ -378,7 +378,7 @@ void NvDecoder::receive_frames(SequenceWrapper& sequence) {
 
       auto* frame_disp_info = frame_queue_.pop();
       if (stop_) break;
-      auto frame = MappedFrame{frame_disp_info, decoder_, stream_};
+      MappedFrame frame{frame_disp_info, decoder_, stream_};
       sequence.timestamps.push_back(frame_disp_info->timestamp * av_q2d(
             nv_time_base_));
       if (stop_) break;