Fix uninitialized read/wrong variable (Reference-LAPACK PR 967)

Author: martin-frbg

lapack-netlib/SRC/sbbcsd.f

@@ -805,7 +805,7 @@ SUBROUTINE SBBCSD( JOBU1, JOBU2, JOBV1T, JOBV2T, TRANS, M, P, Q,
                CALL SLARTGP( B22BULGE, B22E(I-1), WORK(IU2SN+I-1),
      $                       WORK(IU2CS+I-1), R )
             ELSE IF( NU .LT. MU ) THEN
-               CALL SLARTGS( B21E(I), B21E(I+1), NU, WORK(IU2CS+I-1),
+               CALL SLARTGS( B21E(I), B21D(I+1), NU, WORK(IU2CS+I-1),
      $                       WORK(IU2SN+I-1) )
             ELSE
                CALL SLARTGS( B22D(I), B22E(I), MU, WORK(IU2CS+I-1),