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

Author: martin-frbg

lapack-netlib/SRC/zbbcsd.f

@@ -804,7 +804,7 @@ SUBROUTINE ZBBCSD( JOBU1, JOBU2, JOBV1T, JOBV2T, TRANS, M, P, Q,
                CALL DLARTGP( B22BULGE, B22E(I-1), RWORK(IU2SN+I-1),
      $                       RWORK(IU2CS+I-1), R )
             ELSE IF( NU .LT. MU ) THEN
-               CALL DLARTGS( B21E(I), B21E(I+1), NU, RWORK(IU2CS+I-1),
+               CALL DLARTGS( B21E(I), B21D(I+1), NU, RWORK(IU2CS+I-1),
      $                       RWORK(IU2SN+I-1) )
             ELSE
                CALL DLARTGS( B22D(I), B22E(I), MU, RWORK(IU2CS+I-1),