I think she gets fed! They way I read it, "vacated" means that Whittemore's ruling is nullified and "remanded with instructions" means it goes back to Whittemore's court with orders that he make a particular ruling, probably to insert the feeding tube.
Whittemore won't be able to kill her, I don't believe because of the jury and the publicity that the case will generate. I just hope she gets the justice due her, but I am still skeptical of the American system.