Instead of "$projectroot/$pr->{'path'}" to get the path to project
GIT_DIR, it was used "$projectroot/$project" which is valid only
for actions where project parameter is set, and 'project_index' is not
one of them.
Signed-off-by: Jakub Narebski <jnareb@gmail.com> Signed-off-by: Junio C Hamano <junkio@cox.net>