(2nd LD) KT&G's Q4 net falls 7 pct on weak domestic sales

(ATTN: UPDATES with closing share price at bottom) By Kim Eun-jung SEOUL, Jan. 21 (Yonhap) -- KT&G Corp., South Korea's state-run tobacco producer, said Thursday its net profit decreased 7 percent in the fourth quarter from a year ago due to lacklus