loplugin:useuniqueptr in SwFrameSidebarWinContainer

Change-Id: If802bc040f49f6a78068bbcf2b1247a98987be11
Reviewed-on: https://gerrit.libreoffice.org/57938
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

sw/source/uibase/docvw/frmsidebarwincontainer.cxx

@@ -71,7 +71,7 @@ SwFrameSidebarWinContainer::SwFrameSidebarWinContainer()
 SwFrameSidebarWinContainer::~SwFrameSidebarWinContainer()
 {
     mpFrameSidebarWinContainer->clear();
-    delete mpFrameSidebarWinContainer;
+    mpFrameSidebarWinContainer.reset();
 }
 
 bool SwFrameSidebarWinContainer::insert( const SwFrame& rFrame,

sw/source/uibase/docvw/frmsidebarwincontainer.hxx

@@ -20,6 +20,7 @@
 #define INCLUDED_SW_SOURCE_UIBASE_DOCVW_FRMSIDEBARWINCONTAINER_HXX
 
 #include <sal/types.h>
+#include <memory>
 #include <vector>
 
 class SwFrame;
@@ -55,7 +56,7 @@ class SwFrameSidebarWinContainer
                      std::vector< vcl::Window* >* pSidebarWins );
 
     private:
-        FrameSidebarWinContainer* mpFrameSidebarWinContainer;
+        std::unique_ptr<FrameSidebarWinContainer> mpFrameSidebarWinContainer;
 };
 
 } } // eof of namespace sw::sidebarwindows::