Stop leaking all ScPostIt instances.

And re-implement correct swapping of two ScPostIt instances during
sort.

Change-Id: Ifbf120aae594342ae0b7c5760f771c53092c8022
diff --git a/sc/inc/mtvelements.hxx b/sc/inc/mtvelements.hxx
index 0fcafde..3eb5527 100644
--- a/sc/inc/mtvelements.hxx
+++ b/sc/inc/mtvelements.hxx
@@ -65,7 +65,7 @@ const mdds::mtv::element_t element_type_empty = mdds::mtv::element_type_empty;

/// Custom element blocks.

typedef mdds::mtv::default_element_block<element_type_cellnote, ScPostIt*> cellnote_block;
typedef mdds::mtv::noncopyable_managed_element_block<element_type_cellnote, ScPostIt> cellnote_block;
typedef mdds::mtv::noncopyable_managed_element_block<element_type_broadcaster, SvtBroadcaster> broadcaster_block;
typedef mdds::mtv::default_element_block<element_type_celltextattr, CellTextAttr> celltextattr_block;
typedef mdds::mtv::default_element_block<element_type_string, svl::SharedString> string_block;
diff --git a/sc/source/core/data/column2.cxx b/sc/source/core/data/column2.cxx
index 22fea46..490ccbd 100644
--- a/sc/source/core/data/column2.cxx
+++ b/sc/source/core/data/column2.cxx
@@ -1902,8 +1902,6 @@ void ScColumn::SwapCellNotes( SCROW nRow1, SCROW nRow2 )
    if (aPos2.first == maCellNotes.end())
        return;

    ScPostIt* aNote;

    sc::CellNoteStoreType::iterator it1 = aPos1.first, it2 = aPos2.first;
    if (it1->type == it2->type)
    {
@@ -1917,10 +1915,10 @@ void ScColumn::SwapCellNotes( SCROW nRow1, SCROW nRow2 )
            sc::cellnote_block::at(*it2->data, aPos2.second));

        //update Note caption with position
        aNote = sc::cellnote_block::at(*it1->data, aPos1.second);
        aNote->UpdateCaptionPos(ScAddress(nCol,nRow2,nTab));
        aNote = sc::cellnote_block::at(*it2->data, aPos2.second);
        aNote->UpdateCaptionPos(ScAddress(nCol,nRow1,nTab));
        ScPostIt* pNote = sc::cellnote_block::at(*it1->data, aPos1.second);
        pNote->UpdateCaptionPos(ScAddress(nCol,nRow2,nTab));
        pNote = sc::cellnote_block::at(*it2->data, aPos2.second);
        pNote->UpdateCaptionPos(ScAddress(nCol,nRow1,nTab));

        return;
    }
@@ -1931,19 +1929,18 @@ void ScColumn::SwapCellNotes( SCROW nRow1, SCROW nRow2 )
        // row 1 is empty while row 2 is non-empty.
        ScPostIt* pVal2 = sc::cellnote_block::at(*it2->data, aPos2.second);
        it1 = maCellNotes.set(it1, nRow1, pVal2);
        maCellNotes.set_empty(it1, nRow2, nRow2);
        maCellNotes.release<ScPostIt*>(nRow2);
        pVal2->UpdateCaptionPos(ScAddress(nCol,nRow1,nTab)); //update Note caption with position

        return;
    }

    // row 1 is non-empty while row 2 is empty.
    ScPostIt* pVal1 = sc::cellnote_block::at(*it1->data, aPos1.second);
    it1 = maCellNotes.set_empty(it1, nRow1, nRow1);
    ScPostIt* pVal1 = NULL;
    it1 = maCellNotes.release(it1, nRow1, pVal1);
    assert(pVal1);
    maCellNotes.set(it1, nRow2, pVal1);
    pVal1->UpdateCaptionPos(ScAddress(nCol,nRow1,nTab));     //update Note caption with position

    CellStorageModified();
}

SvtBroadcaster* ScColumn::GetBroadcaster(SCROW nRow)