SLEEPLESS IN SEATTLE (PG) Nora Ephron's yuppie romance is so aware of being ''corny'' and ''old-fashioned'' that it feels programmed to make you fall in love with it. Annie (Meg Ryan), a Baltimore newspaper reporter, tunes into a radio call-in show and hears Sam (Tom Hanks), a Seattle widower, going on in a quiet voice about how badly he misses his wife. Ephron is trying for something whimsically farfetched-for ''magic''-but what she misses about the classic romantic weepers is their delicately sexy sparkle. She gets the corn without the smolder. ( 176/177, June 25) C -OG

