flat text DB: fix move by bookmark

To test whether the range [a,b( is *before* e,
compare e to b, not to a.

This makes a difference when a==b, which happens for row 0 (header)
when there is no header.

Change-Id: I629b71936f82a468febe0360909264dd80304437
diff --git a/connectivity/source/drivers/flat/ETable.cxx b/connectivity/source/drivers/flat/ETable.cxx
index 2fefbaa..bcc866d 100644
--- a/connectivity/source/drivers/flat/ETable.cxx
+++ b/connectivity/source/drivers/flat/ETable.cxx
@@ -756,22 +756,13 @@ void OFlatTable::refreshHeader()
// -----------------------------------------------------------------------------
namespace
{
    template< typename Tp, typename Te> struct PairFirstLess
    template< typename Tp, typename Te> struct RangeBefore
    {
        bool operator() (const Tp &p, const Te &e)
        {
            return p.first < e;
            assert(p.first <= p.second);
            return p.second <= e;
        }
#ifdef DBG_UTIL
        bool operator() (const Te &e, const Tp &p)
        {
            return e < p.first;
        }
        bool operator() (const Tp &p1, const Tp &p2)
        {
            return p1.first < p2.first;
        }
#endif
    };
}
// -----------------------------------------------------------------------------
@@ -910,7 +901,7 @@ sal_Bool OFlatTable::seekRow(IResultSetHelper::Movement eCursorPosition, sal_Int
                vector< TRowPositionInFile >::const_iterator aFind = lower_bound(m_aRowPosToFilePos.begin(),
                                                                                 m_aRowPosToFilePos.end(),
                                                                                 nOffset,
                                                                                 PairFirstLess< TRowPositionInFile, sal_Int32 >());
                                                                                 RangeBefore< TRowPositionInFile, sal_Int32 >());

                if(aFind == m_aRowPosToFilePos.end() || aFind->first != nOffset)
                    //invalid bookmark