Handle SHGetKnownFolderPath failing - return empty string
Handle SHGetKnownFolderPath failing - return empty string

* The calling code will handle this as an unknown path and fail upwards.

googlestadia/renderdoc,TurtleRockStudios/renderdoc_public,baldurk/renderdoc,TurtleRockStudios/renderdoc_public,baldurk/renderdoc,googlestadia/renderdoc,baldurk/renderdoc,Zorro666/renderdoc,Zorro666/renderdoc,googlestadia/renderdoc,baldurk/renderdoc,googlestadia/renderdoc,googlestadia/renderdoc,baldurk/renderdoc,Zorro666/renderdoc,TurtleRockStudios/renderdoc_public,googlestadia/renderdoc,TurtleRockStudios/renderdoc_public,baldurk/renderdoc,Zorro666/renderdoc,TurtleRockStudios/renderdoc_public,TurtleRockStudios/renderdoc_public,Zorro666/renderdoc,Zorro666/renderdoc