largefiles: fix 'hg status' abort after merge If a largefile is introduced on the branch that is merged into the working copy, then 'hg status' would abort with an error like: $ hg status abort: .hglf/foo@33fdd332ec64: not found in manifest! The problem was that the largefiles status code only looked in the first parent for the largefile. Largefiles are now always reported as modified if they don't exist in the first parent -- this matches the behavior of localrepo.status for normal files.