loplugin:useuniqueptr in ScCellFormatsEnumeration

Change-Id: I5551b65d4c7fea7e38d7c5b40af7c1803218b960
Reviewed-on: https://gerrit.libreoffice.org/57203
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

sc/inc/cellsuno.hxx

@@ -1150,7 +1150,7 @@ class ScCellFormatsEnumeration : public cppu::WeakImplHelper<
 private:
     ScDocShell*             pDocShell;
     SCTAB                   nTab;
-    ScAttrRectIterator*     pIter;
+    std::unique_ptr<ScAttrRectIterator> pIter;
     ScRange                 aNext;
     bool                    bAtEnd;
     bool                    bDirty;

sc/source/ui/unoobj/cellsuno.cxx

@@ -9176,9 +9176,9 @@ ScCellFormatsEnumeration::ScCellFormatsEnumeration(ScDocShell* pDocSh, const ScR
     OSL_ENSURE( rRange.aStart.Tab() == rRange.aEnd.Tab(),
                 "CellFormatsEnumeration: different tables" );
 
-    pIter = new ScAttrRectIterator( &rDoc, nTab,
+    pIter.reset( new ScAttrRectIterator( &rDoc, nTab,
                                     rRange.aStart.Col(), rRange.aStart.Row(),
-                                    rRange.aEnd.Col(), rRange.aEnd.Row() );
+                                    rRange.aEnd.Col(), rRange.aEnd.Row() ) );
     Advance_Impl();
 }
 
@@ -9188,7 +9188,6 @@ ScCellFormatsEnumeration::~ScCellFormatsEnumeration()
 
     if (pDocShell)
         pDocShell->GetDocument().RemoveUnoObject(*this);
-    delete pIter;
 }
 
 void ScCellFormatsEnumeration::Advance_Impl()
@@ -9240,8 +9239,7 @@ void ScCellFormatsEnumeration::Notify( SfxBroadcaster&, const SfxHint& rHint )
         if ( nId == SfxHintId::Dying )
         {
             pDocShell = nullptr;
-            delete pIter;
-            pIter = nullptr;
+            pIter.reset();
         }
         else if ( nId == SfxHintId::DataChanged )
         {