 corresponding to the scaled Q, R, and L, if JOBB = 'B'
          and SCAL = 'G'. That is,

                 (S   S  )
                 ( 11  12)
             S = (       ),
                 (0   S  )
                 (     22)

          where S  , S   and S   are N-by-N matrices.
                 11   12      22
          Array S must have 2*N+M columns if JOBB = 'B', and 2*N
          columns, otherwise.

  LDS     INTEGER
          The leading dimension of array S.
          LDS &gt;= MAX(1,2*N+M) if JO