[PATCH 7/8] xfs: clean up sign warnings in dir2 code

[Christoph Hellwig]

On Tue, Jan 19, 2010 at 11:30:25AM +1100, Dave Chinner wrote:
> We are now consistently using unsigned char strings for names
> so fix up the remaining warnings in the dir2 code to complete
> the cleanup.

The cast in the initializers looks a bit ugly, but I don't know a better
way either.
Reviewed-by: Christoph Hellwig <hch at lst.de>