message: fix bug stack when dim -1
diff: @@ -19,9 +19,16 @@ auto stack_registrations TORCHTRT_UNUSED = RegisterNodeConversionPatterns().patt
  [](ConversionCtx* ctx, const torch::jit::Node* n, args& args) -> bool {
  auto in = args[0].IValue()->toListRef();
  auto dim = args[1].unwrapToInt();
  + if (-1 == dim) {
  + auto first_in = in[0];
  + if (first_in.isTensor()) {
  + dim = first_in.toTensor().ndimension();
  + } else {
  + dim = first_in.toCustomClass<TensorContainer>()->tensor()->getDimensions().nbDims;
  + }
  + }
  std::vector<nvinfer1::ITensor*> tensors;
  -
  for (auto t : in) {
  nvinfer1::ITensor* itensor;
  