Lovely dollops of wit and warmth float through the big-screen version of &ldquo;Astro Boy,&rdquo; the latest Japanese TV cartoon to make it to the movies. But the look, themes and slam-bang &ldquo;Transformers&rdquo; violence of that 1960s animated series make this every bit as dated as &ldquo;Speed Racer,&rdquo; even if it is easier to watch. 