Well, I don't know what the official answer is, but I always saw Sally as a rag doll. All of the scar-looking lines she has on her body and her face look like stitches, and a couple of times throughout the movie she is shown either sewing one of her own limbs back on, or, near the beginning, Dr. Finkelstein is shown sewing them back on for her.
Plus, the Wikipedia page describes Sally as a "Frankenstein-esque ragdoll." The word zombie isn't even there. (Though I know that Wikipedia isn't exactly the primary authority on this, it was the only info I could find.)
link