loplugin:useuniqueptr in DocxExport

Change-Id: I8d98585fa759070a82bf5738d20b018ec9fbabf0
Reviewed-on: https://gerrit.libreoffice.org/58016
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

sw/source/filter/ww8/docxexport.cxx

@@ -511,7 +511,7 @@ void DocxExport::ExportDocument_Impl()
     InitStyles();
 
     // init sections
-    m_pSections = new MSWordSections( *this );
+    m_pSections.reset(new MSWordSections( *this ));
 
     // Make sure images are counted from one, even when exporting multiple documents.
     oox::drawingml::DrawingML::ResetCounters();
@@ -541,8 +541,7 @@ void DocxExport::ExportDocument_Impl()
     m_aLinkedTextboxesHelper.clear();   //final cleanup
     delete m_pStyles;
     m_pStyles = nullptr;
-    delete m_pSections;
-    m_pSections = nullptr;
+    m_pSections.reset();
 }
 
 void DocxExport::AppendSection( const SwPageDesc *pPageDesc, const SwSectionFormat* pFormat, sal_uLong nLnNum )

sw/source/filter/ww8/docxexport.hxx

@@ -82,7 +82,7 @@ class DocxExport : public MSWordExportBase
     std::unique_ptr<DocxAttributeOutput> m_pAttrOutput;
 
     /// Sections/headers/footers
-    MSWordSections *m_pSections;
+    std::unique_ptr<MSWordSections> m_pSections;
 
     /// Header counter.
     sal_Int32 m_nHeaders;