ORowSetCache: handle case total data < m_nFetchSize
ORowSetCache: handle case total data < m_nFetchSize

As a drive-by: fillMatrix update m_nEndSize

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core