Naysayers like David Poland have said the script for Children of Men doesn’t make it (i.e., underwritten, doesn’t explain stuff thoroughly enough) and then along comes the bequeathers of the 19th annual USC Libraries Scripter Award and they hand it over to P.D. James, author of “The Children of Men,” and the film’s screenwriters Alfonso Cuaron, Timothy J. Sexton, David Arata, Mark Fergus and Hawk Ostby. Don’t these people get it? Poland explained the film’s story and character problems in his last “Hot Button” column.