Solidarity leader Lech Walesa sat down with government leaders Thursday to discuss setting up broader talks on the future of the banned labor movement. Walesa is taking a tough line and demanding that his independent trade union be legalized. Solidarity was suppressed in a December 1981 military crackdown and was outlawed the following fall. Thursday's talks followed a similar meeting Aug. 31, after Poland's worst labor unrest since the crackdown. Walesa was accompanied by mediator Andrzej Stelmachowski and the Rev. Alojzy Orszulik of Warsaw.