use unique_ptr in SwNodes::ExpandRangeForTableBox

Change-Id: I31cc9d6b962c116c64789d886b82ea476f4e5144
Reviewed-on: https://gerrit.libreoffice.org/66124
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

sw/inc/ndarr.hxx

@@ -258,7 +258,7 @@ public:
                                 SwTextFormatColl* pTextColl,
                                 SwUndoTextToTable* pUndo );
 
-    SwNodeRange * ExpandRangeForTableBox(const SwNodeRange & rRange);
+    std::unique_ptr<SwNodeRange> ExpandRangeForTableBox(const SwNodeRange & rRange);
 
     /// create a table from a vector of NodeRanges - API support
     SwTableNode* TextToTable( const TableRanges_t& rTableNodes,

sw/source/core/docnode/ndtbl.cxx

@@ -1279,9 +1279,8 @@ const SwTable* SwDoc::TextToTable( const std::vector< std::vector<SwNodeRange> >
     return &rNdTable;
 }
 
-SwNodeRange * SwNodes::ExpandRangeForTableBox(const SwNodeRange & rRange)
+std::unique_ptr<SwNodeRange> SwNodes::ExpandRangeForTableBox(const SwNodeRange & rRange)
 {
-    SwNodeRange * pResult = nullptr;
     bool bChanged = false;
 
     SwNodeIndex aNewStart = rRange.aStart;
@@ -1335,9 +1334,9 @@ SwNodeRange * SwNodes::ExpandRangeForTableBox(const SwNodeRange & rRange)
         pNode = &aIndex.GetNode();
     }
 
+    std::unique_ptr<SwNodeRange> pResult;
     if (bChanged)
-        pResult = new SwNodeRange(aNewStart, aNewEnd);
-
+        pResult.reset(new SwNodeRange(aNewStart, aNewEnd));
     return pResult;
 }
 

sw/source/core/unocore/unotext.cxx

@@ -1835,10 +1835,10 @@ void SwXText::Impl::ConvertCell(
 
     SwNodeRange aTmpRange(aStartCellPam.Start()->nNode,
                           aEndCellPam.End()->nNode);
-    SwNodeRange * pCorrectedRange =
+    std::unique_ptr<SwNodeRange> pCorrectedRange =
         m_pDoc->GetNodes().ExpandRangeForTableBox(aTmpRange);
 
-    if (pCorrectedRange != nullptr)
+    if (pCorrectedRange)
     {
         SwPaM aNewStartPaM(pCorrectedRange->aStart, 0);
         aStartCellPam = aNewStartPaM;
@@ -1851,7 +1851,7 @@ void SwXText::Impl::ConvertCell(
         SwPaM aNewEndPaM(pCorrectedRange->aEnd, nEndLen);
         aEndCellPam = aNewEndPaM;
 
-        delete pCorrectedRange;
+        pCorrectedRange.reset();
     }
 
     /** check the nodes between start and end