CREATE TABLE table_74657 ("Party" CLOB, "Seats" CLOB, "Net gain/loss" CLOB, "% of seats" CLOB, "% of votes" CLOB)

When the Swedish People's Party had a net gain/loss of 0, how many seats did they have?
SELECT "Seats" FROM table_74657 WHERE "Net gain/loss" = '0' AND "Party" = 'swedish people''s party'
SELECT "Seats" FROM "table_74657" WHERE "Net gain/loss" = '0' AND "Party" = 'swedish people''s party'