tdf#117205 impress crash when moving an item in a list

regression from
   commit 891e41fac81fbd8d5cdb277b26639abfd25a7143 (patch)
   dead code in AccessibleTextHelper_Impl::UpdateVisibleChildren

Change-Id: I0db104fcde91597dc71b6cae6c547a0cedac4af2
Reviewed-on: https://gerrit.libreoffice.org/53721
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
diff --git a/svx/source/accessibility/AccessibleTextHelper.cxx b/svx/source/accessibility/AccessibleTextHelper.cxx
index 9f1061b..2707d76 100644
--- a/svx/source/accessibility/AccessibleTextHelper.cxx
+++ b/svx/source/accessibility/AccessibleTextHelper.cxx
@@ -759,12 +759,15 @@ namespace accessibility
            SvxTextForwarder& rCacheTF = GetTextForwarder();
            sal_Int32 nParas=rCacheTF.GetParagraphCount();

            mnFirstVisibleChild = nParas ? 0 : -1;
            mnFirstVisibleChild = -1;
            mnLastVisibleChild = -2;

            if (mxFrontEnd.is() && bBroadcastEvents)
            for( sal_Int32 nCurrPara=0; nCurrPara<nParas; ++nCurrPara )
            {
                for( sal_Int32 nCurrPara=0; nCurrPara<nParas; ++nCurrPara )
                if (nCurrPara == 0)
                    mnFirstVisibleChild = nCurrPara;
                mnLastVisibleChild = nCurrPara;
                if (mxFrontEnd.is() && bBroadcastEvents)
                {
                    // child not yet created?
                    ::accessibility::AccessibleParaManager::WeakChild aChild( maParaManager.GetChild(nCurrPara) );
@@ -777,8 +780,6 @@ namespace accessibility
                    }
                }
            }

            mnLastVisibleChild = nParas - 1;
        }
        catch( const uno::Exception& )
        {