This fixes a condition in filter_forks_from_projects_list that failed if
process directory was different from project root: in such case, the subroutine
was a no-op and forks were not detected.
Signed-off-by: Julien Muchembled <jm@jmuchemb.eu> Tested-by: Jakub Narebski <jnareb@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>