Hundreds of lucky Harry Potter fans and their friends and families were treated to an advance screening of “Harry Potter and the Deathly Hallows, Part 1” on Nov. 18, one day before the film opened to the public. The 558-seat theater at the Century 22 in San Jose was filled to capacity for the screening of the movie, the first in a two-part series based on the novel of the same name, which is the final installment of the “Harry Potter” book franchise.