“Renfield” is not Nicolas Cage’s first blush with a vampire. The bad news is that Cage’s Dracula is only a supporting role here, making “Renfield” more of a tasty morsel than a satisfying feast. That’s no discredit to Nicholas Hoult, who plays Bram Stoker’s devoted henchman to Dracula in Chris McKay’s “Renfield,” which opens in theaters Friday. The film, penned …
