Pixar movies have a special place in my heart. One of my favorite parts about going to see one is the animated short film that precedes the actual movie. Before “Coco,” however, came an original short which was neither original nor short. “Olaf’s Frozen Adventure” was the short in question, and after being forced to watch twenty-odd minutes of the all-too-familiar snowman from “Frozen” bellowing about the joys of a perfect Christmas, I was more than ready for “Coco” to start.