loplugin:useuniqueptr in ScCellsEnumeration

Change-Id: I2ab494c977e6c877064ba6561d850b62bef2b438
Reviewed-on: https://gerrit.libreoffice.org/56911
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

sc/inc/cellsuno.hxx

@@ -1082,7 +1082,7 @@ private:
     ScDocShell*             pDocShell;
     ScRangeList             aRanges;
     ScAddress               aPos;
-    ScMarkData*             pMark;
+    std::unique_ptr<ScMarkData> pMark;
     bool                    bAtEnd;
 
 private:

sc/source/ui/unoobj/cellsuno.cxx

@@ -8951,7 +8951,7 @@ void ScCellsEnumeration::CheckPos_Impl()
     {
         if (!pMark)
         {
-            pMark = new ScMarkData;
+            pMark.reset( new ScMarkData );
             pMark->MarkFromRangeList(aRanges, false);
             pMark->MarkToMulti();   // needed for GetNextMarkedCell
         }
@@ -8967,7 +8967,7 @@ ScCellsEnumeration::~ScCellsEnumeration()
 
     if (pDocShell)
         pDocShell->GetDocument().RemoveUnoObject(*this);
-    delete pMark;
+    pMark.reset();
 }
 
 void ScCellsEnumeration::Advance_Impl()
@@ -8975,7 +8975,7 @@ void ScCellsEnumeration::Advance_Impl()
     OSL_ENSURE(!bAtEnd,"too much Advance_Impl");
     if (!pMark)
     {
-        pMark = new ScMarkData;
+        pMark.reset( new ScMarkData );
         pMark->MarkFromRangeList( aRanges, false );
         pMark->MarkToMulti();   // needed for GetNextMarkedCell
     }
@@ -9000,8 +9000,7 @@ void ScCellsEnumeration::Notify( SfxBroadcaster&, const SfxHint& rHint )
             aRanges.UpdateReference( pRefHint->GetMode(), &pDocShell->GetDocument(), pRefHint->GetRange(),
                                      pRefHint->GetDx(), pRefHint->GetDy(), pRefHint->GetDz() );
 
-            delete pMark;       // recreate from moved area
-            pMark = nullptr;
+            pMark.reset();       // recreate from moved area
 
             if (!bAtEnd)        // adjust aPos
             {