libgit2/libgit2sharp — pull request #775 by jamill (2014-06-30 19:55:00+00:00)
Title: Handle tags that do not have a tagger.

Not all tags have a tagger. For example, the v2.6.11 tag on the linux repository does not have a tagger. For these cases, return null for the Tagger property on a tag annotation.