loplugin:useuniqueptr in SwMailMergeLayoutPage

Change-Id: Ia8411b8efa792fe06f25765a2aa4d479c66f1ec5
Reviewed-on: https://gerrit.libreoffice.org/58249
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

sw/source/ui/dbui/mmlayoutpage.cxx

@@ -123,8 +123,8 @@ SwMailMergeLayoutPage::SwMailMergeLayoutPage( SwMailMergeWizard* _pParent) :
     xStore->storeToURL( m_sExampleURL, aValues   );
 
     Link<SwOneExampleFrame&,void> aLink(LINK(this, SwMailMergeLayoutPage, PreviewLoadedHdl_Impl));
-    m_pExampleFrame = new SwOneExampleFrame( *m_pExampleContainerWIN,
-                                    EX_SHOW_DEFAULT_PAGE, &aLink, &m_sExampleURL );
+    m_pExampleFrame.reset( new SwOneExampleFrame( *m_pExampleContainerWIN,
+                                    EX_SHOW_DEFAULT_PAGE, &aLink, &m_sExampleURL ) );
 
     m_pExampleContainerWIN->Show(false);
 
@@ -165,7 +165,7 @@ SwMailMergeLayoutPage::~SwMailMergeLayoutPage()
 
 void SwMailMergeLayoutPage::dispose()
 {
-    delete m_pExampleFrame;
+    m_pExampleFrame.reset();
     File::remove( m_sExampleURL );
     m_pPosition.clear();
     m_pAlignToBodyCB.clear();

sw/source/ui/dbui/mmlayoutpage.hxx

@@ -52,7 +52,7 @@ class SwMailMergeLayoutPage : public svt::OWizardPage
 
     VclPtr<ListBox>            m_pZoomLB;
 
-    SwOneExampleFrame*  m_pExampleFrame;
+    std::unique_ptr<SwOneExampleFrame> m_pExampleFrame;
     SwWrtShell*         m_pExampleWrtShell;
 
     OUString            m_sExampleURL;