message: fix the issue when doing tf.Cast operation
  Fix the issue:
diff: @@ -1205,7 +1205,7 @@ Status ConstantFolding::CreateNodeDef(const string& name,
  case DT_INT64:
  POPULATE_TENSOR_PROTO(tensor, t, int64, int64);
  case DT_UINT64:
  - POPULATE_TENSOR_PROTO(tensor, t, uint64, int64);
  + POPULATE_TENSOR_PROTO(tensor, t, uint64, uint64);
  case DT_INT32:
  POPULATE_TENSOR_PROTO(tensor, t, int32, int);
  case DT_UINT32:
  