[merge][rfc] small inventory apply_delta patch

[Bundle Buggy]

Bundle Buggy has detected this merge request.

For details, see: 
http://bundlebuggy.aaronbentley.com/project/bzr/request/%3Ce01316480811102304s60b1df9cnf62aec9748a61346%40mail.gmail.com%3E
Project: Bazaar