Return max distance when typed cells are invalid.

1 files changed, 1 insertions, 0 deletions

diff --git a/eval/src/vespa/eval/eval/typed_cells.h b/eval/src/vespa/eval/eval/typed_cells.h
index 6cb8675cd5f..3dd8c30a3a9 100644
--- a/eval/src/vespa/eval/eval/typed_cells.h
+++ b/eval/src/vespa/eval/eval/typed_cells.h
@@ -36,6 +36,7 @@ struct TypedCells {
     TypedCells(const TypedCells &other) noexcept = default;
     TypedCells & operator= (TypedCells &&other) noexcept = default;
     TypedCells & operator= (const TypedCells &other) noexcept = default;
+    bool valid() const noexcept { return size != 0; }
 };
 
 } // namespace