don't run GetCaseName with Path.Combine on rooted path

[rfht]

This looks like a copy-pasto from the lines just below that use the same structure if(Path.IsPathRooted...){...}...;, but there it's fine because those are return statements. Here the result for a rooted path would be addition of TitleLocation.Path before the already rooted path.

From my observation with some debug prints, I don't think rooted paths are encountered much (if ever). This is likely the reason why this issue hasn't shown up.