Avoid undef downcast in base class ctor

Change-Id: I71eecfdc657b153f9289e8e9af52fba9ed22d3a8

sw/inc/ndarr.hxx

@@ -90,6 +90,7 @@ class SW_DLLPUBLIC SwNodes
     friend class SwDoc;
     friend class SwNode;
     friend class SwNodeIndex;
+    friend class SwStartNode;
     friend class ::sw::DocumentContentOperationsManager;
 
     SwNodeIndex* pRoot;                 ///< List of all indices on nodes.

sw/source/core/docnode/node.cxx

@@ -289,9 +289,9 @@ SwNode::SwNode( const SwNodeIndex &rWhere, const sal_uInt8 nNdType )
 #endif
     , pStartOfSection( 0 )
 {
-    SwNodes& rNodes = const_cast<SwNodes&> (rWhere.GetNodes());
     if( rWhere.GetIndex() )
     {
+        SwNodes& rNodes = const_cast<SwNodes&> (rWhere.GetNodes());
         SwNode* pNd = rNodes[ rWhere.GetIndex() -1 ];
         rNodes.InsertNode( this, rWhere );
         if( 0 == ( pStartOfSection = pNd->GetStartNode()) )
@@ -304,11 +304,6 @@ SwNode::SwNode( const SwNodeIndex &rWhere, const sal_uInt8 nNdType )
             }
         }
     }
-    else
-    {
-        rNodes.InsertNode( this, rWhere );
-        pStartOfSection = (SwStartNode*)this;
-    }
 }
 
 /** Inserts a node into the rNodes array at the rWhere position
@@ -341,11 +336,6 @@ SwNode::SwNode( SwNodes& rNodes, sal_uLong nPos, const sal_uInt8 nNdType )
             }
         }
     }
-    else
-    {
-        rNodes.InsertNode( this, nPos );
-        pStartOfSection = (SwStartNode*)this;
-    }
 }
 
 SwNode::~SwNode()
@@ -851,6 +841,12 @@ SwStartNode::SwStartNode( const SwNodeIndex &rWhere, const sal_uInt8 nNdType,
                             SwStartNodeType eSttNd )
     : SwNode( rWhere, nNdType ), eSttNdTyp( eSttNd )
 {
+    if( !rWhere.GetIndex() )
+    {
+        SwNodes& rNodes = const_cast<SwNodes&> (rWhere.GetNodes());
+        rNodes.InsertNode( this, rWhere );
+        pStartOfSection = this;
+    }
     // Just do this temporarily until the EndNode is inserted
     pEndOfSection = (SwEndNode*)this;
 }
@@ -858,6 +854,11 @@ SwStartNode::SwStartNode( const SwNodeIndex &rWhere, const sal_uInt8 nNdType,
 SwStartNode::SwStartNode( SwNodes& rNodes, sal_uLong nPos )
     : SwNode( rNodes, nPos, ND_STARTNODE ), eSttNdTyp( SwNormalStartNode )
 {
+    if( !nPos )
+    {
+        rNodes.InsertNode( this, nPos );
+        pStartOfSection = this;
+    }
     // Just do this temporarily until the EndNode is inserted
     pEndOfSection = (SwEndNode*)this;
 }