crashtesting: failed on reexport of fdo64646-4.xls

since...

commit 7282014e362a1529a36c88eb308df8ed359c2cfa
Date:   Fri Feb 1 15:15:16 2019 +0100

    tdf#50916 Makes numbers of columns dynamic

Change-Id: Id013d1005605f7c7b58b4065ead1e6053cedd45d
Reviewed-on: https://gerrit.libreoffice.org/70601
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>
diff --git a/sc/source/core/data/table2.cxx b/sc/source/core/data/table2.cxx
index 2a288c4..e48f239 100644
--- a/sc/source/core/data/table2.cxx
+++ b/sc/source/core/data/table2.cxx
@@ -1952,7 +1952,7 @@
sal_uInt32 ScTable::GetNumberFormat( SCCOL nCol, SCROW nRow ) const
{
    if (ValidColRow(nCol,nRow))
        return aCol[nCol].GetNumberFormat( pDocument->GetNonThreadedContext(), nRow );
        return CreateColumnIfNotExists(nCol).GetNumberFormat(pDocument->GetNonThreadedContext(), nRow);
    else
        return 0;
}
@@ -1962,7 +1962,7 @@
    if (!ValidCol(nCol) || !ValidRow(nStartRow) || !ValidRow(nEndRow))
        return 0;

    return aCol[nCol].GetNumberFormat(nStartRow, nEndRow);
    return CreateColumnIfNotExists(nCol).GetNumberFormat(nStartRow, nEndRow);
}

void ScTable::SetNumberFormat( SCCOL nCol, SCROW nRow, sal_uInt32 nNumberFormat )