message: solve the tf.cast issue
  solve the issue
diff: @@ -1209,7 +1209,7 @@ Status ConstantFolding::CreateNodeDef(const string& name,
  case DT_INT32:
  POPULATE_TENSOR_PROTO(tensor, t, int32, int);
  case DT_UINT32:
  - POPULATE_TENSOR_PROTO(tensor, t, uint32, int);
  + POPULATE_TENSOR_PROTO(tensor, t, uint32, uint32);
  case DT_INT16:
  POPULATE_TENSOR_PROTO(tensor, t, int16, int);
  case DT_UINT16:
  