libgit2/libgit2 — pull request #1083 by nulltoken (2012-11-18 21:43:56+00:00)
Title: Fix git_branch_tracking() for branches with empty merge and/or remote config entries

A slight change introduced by 0da81d2b39290fe4d444953acb6d68795ed1ef42 changes the way `git_config_get_string()` handles config entries with no value.

This makes `git_branch_tracking()` cope with this new behavior