Reactivate Iteration::closed() check

seems to fail in some instances

Author: franzpoeschel

src/RecordComponent.cpp

@@ -51,8 +51,10 @@ namespace internal
         Attributable a;
         a.setData(std::shared_ptr<AttributableData>{this, [](auto const &) {}});
 // this check can be too costly in some setups
-#if 0
-        if (a.containingIteration().closed())
+#if 1
+        if ((*a.containingIteration().first.value())
+                .asInternalCopyOf<Iteration>()
+                .closed())
         {
             throw error::WrongAPIUsage(
                 "Cannot write/read chunks to/from closed Iterations.");