Fixes the KeyError exception breaking the tests

sigmavirus24 · sigmavirus24 · commit ced6d5578d6c · 2012-09-18T13:25:12.000-04:00
diff --git a/github3/git.py b/github3/git.py
@@ -61,7 +61,7 @@ def __init__(self, commit, session=None):
         #: dict containing at least the name, email and date the commit was
         #  created
         self.author = commit.get('author')
-        self._author_name = self.author['name']
+        self._author_name = self.author.get('name', '')
 
         #: dict containing similar information to the author attribute
         self.committer = commit.get('committer')
