loplugin:useuniqueptr in ScAccessiblePreviewTable

Change-Id: I75b37dab51f3510f6e7155c191a85af99b0d350f
Reviewed-on: https://gerrit.libreoffice.org/56547
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

sc/source/ui/Accessibility/AccessiblePreviewTable.cxx

@@ -76,8 +76,7 @@ void SAL_CALL ScAccessiblePreviewTable::disposing()
         mpViewShell = nullptr;
     }
 
-    if (mpTableInfo)
-        DELETEZ (mpTableInfo);
+    mpTableInfo.reset();
 
     ScAccessibleContextBase::disposing();
 }
@@ -91,7 +90,7 @@ void ScAccessiblePreviewTable::Notify( SfxBroadcaster& rBC, const SfxHint& rHint
     {
         //  column / row layout may change with any document change,
         //  so it must be invalidated
-        DELETEZ( mpTableInfo );
+        mpTableInfo.reset();
     }
     else if (nId == SfxHintId::ScAccVisAreaChanged)
     {
@@ -637,7 +636,7 @@ void ScAccessiblePreviewTable::FillTableInfo() const
             aOutputSize = pWindow->GetOutputSizePixel();
         tools::Rectangle aVisRect( Point(), aOutputSize );
 
-        mpTableInfo = new ScPreviewTableInfo;
+        mpTableInfo.reset( new ScPreviewTableInfo );
         mpViewShell->GetLocationData().GetTableInfo( aVisRect, *mpTableInfo );
     }
 }

sc/source/ui/inc/AccessiblePreviewTable.hxx

@@ -124,7 +124,7 @@ protected:
 private:
     ScPreviewShell*     mpViewShell;
     sal_Int32           mnIndex;
-    mutable ScPreviewTableInfo* mpTableInfo;
+    mutable std::unique_ptr<ScPreviewTableInfo> mpTableInfo;
 
     bool IsDefunc(
         const css::uno::Reference<css::accessibility::XAccessibleStateSet>& rxParentStates);