loplugin:useuniqueptr in SvxCheckListBox

Change-Id: Ib867d42363a500ea5acfc0998dd33657d3a701c3
Reviewed-on: https://gerrit.libreoffice.org/53708Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

include/svx/checklbx.hxx

@@ -28,6 +28,7 @@
 #include <tools/wintypes.hxx>
 #include <vcl/event.hxx>
 #include <vcl/window.hxx>
+#include <memory>
 
 class Image;
 class SvLBoxButtonData;
@@ -40,7 +41,7 @@ class SVX_DLLPUBLIC SvxCheckListBox : public SvTreeListBox
     using Window::GetText;
 
 private:
-    SvLBoxButtonData*   pCheckButton;
+    std::unique_ptr<SvLBoxButtonData> pCheckButton;
 
     SVX_DLLPRIVATE void             Init_Impl();
 

svx/source/dialog/checklbx.cxx

@@ -44,14 +44,14 @@ SvxCheckListBox::~SvxCheckListBox()
 
 void SvxCheckListBox::dispose()
 {
-    delete pCheckButton;
+    pCheckButton.reset();
     SvTreeListBox::dispose();
 }
 
 void SvxCheckListBox::Init_Impl()
 {
-    pCheckButton = new SvLBoxButtonData( this );
-    EnableCheckButton( pCheckButton );
+    pCheckButton.reset(new SvLBoxButtonData( this ));
+    EnableCheckButton( pCheckButton.get() );
 }
 
 void SvxCheckListBox::InsertEntry( const OUString& rStr, sal_uLong nPos,