[#4499] Fixed IndexError in SVN repo refresh.
If we're refreshing the first commit, there won't be a parent, and therefore no left-hand-side for the commit diff.
Signed-off-by: Tim Van Steenburgh tvansteenburgh@gmail.com
Authored by: Tim Van Steenburgh 2012-07-05
Parent(s): [bb203d]
Child(ren): [9fe7c4]
Tim Van Steenburgh
