Basically the main hook of this movie is the fact that Harry Potter is doing rom-coms now.  Huh.  The promos for this film have been all over the radio stations the past few days so it is almost literally impossible to not hear Daniel Radcliffe's prolonged "Yeaaaah, why not?" in that accent of his, capturing my very sentiments about the movie itself. Here's my round-up of Michael Dowse (Take Me Home Tonight)'s entry to the Torronto International Film Fest last year, What If. Please note that there may be spoilers.  Read at your own risk. THE STORY: Wallace (Daniel Radcliffe…