sw_redlinehide_2: DelFrames is called for hidden nodes too now

Change-Id: I9933d8b8ee29bb4da74819d7d2350a5b2b04aa09

sw/source/core/layout/wsfrm.cxx

@@ -4333,8 +4333,11 @@ static void UnHideRedlines(SwRootFrame & rLayout,
             {
                 if (rNode.IsContentNode())
                 {
-                    // note: no-op for NonFirst nodes, only Hidden will delete
-                    static_cast<SwContentNode&>(rNode).DelFrames(&rLayout);
+                    // note: nothing to do here, already done
+#ifndef NDEBUG
+                    auto const pFrame(static_cast<SwContentNode&>(rNode).getLayoutFrame(&rLayout));
+                    assert(!pFrame || static_cast<SwTextFrame*>(pFrame)->GetMergedPara()->pFirstNode != &rNode);
+#endif
                 }
                 else if (rNode.IsTableNode())
                 {