Even though it was made some 25 years, or so, before "My Fair Lady" it still takes a few minutes before you get used to the fact that it has no singing... Once that has been established, we can enjoy a witty and pithy observation of class and superficiality that raises both smiles and heckles in equal measure. Leslie Howard is great as the somewhat snobbish phonetics expert ("Prof. Higgins") who bets his pal "Col. Pickering" (Scott Sunderland) that he can take the gutturally linguistic flower girl "Eliza" (Wendy Hiller) and pass her off as a duchess to the highest of society. Hiller is…