 Shares of Warner Music Group Corp. WMG, 1.68 gained 0.1 in premarket trading Tuesday, after the music recorder and publisher disclosed fiscal third-quarter profit and revenue that beat expectations, as a new wave of releases in June helped offset a slowdown in the advertising market. Net income doubled to 124 million, or 24 cents a share, from 61 million, or 12 cents a share, in the year-ago period. 