`M'

M (STAR) (STAR) (STAR) (STAR) Franz Becker Peter Lorre Inspector Lohmann Otto Wernicke Schraenker Gustaf Grundgens Bauernfaenger Theo Lingen Mme. Becker Ellen Widmann Directed by Fritz Lang and written by Lang, Thea von Harbou, PaulFalkenberg, Adolf Jansen and Karl Vash. Running time: 117 minutes.No MPAA rating (adult theme makes it unsuitable for children).Opening Friday at the Music Box. The horror of the faces: That is the overwhelming image that remainsfrom a recent viewing of the restored version of "M," Fritz Lang'sfamous 1931 film about a child murderer in Germany, which opensFriday at the Music Box. In my memory it was a film that centered onthe …