Will Thorne Staff WriterThe premiere of ABC’s new sitcom “United We Fall” scored decent numbers and topped Wednesday night in the process.The Will Sasso and Christina Vidal comedy debuted to a 0.6 rating among adults 18-49 and drew 4.2 million total viewers. While those numbers are lower than any of the network’s premieres for the fall season, they compare favorably to those put up by “The Baker and the Beauty,” which premiered to a 0.5 rating and 2.7 million viewers in April.