xfs: make xfs_dir_cilookup_result use unsigned char

For consistency with the result of the code.

Signed-off-by: Dave Chinner <david@fromorbit.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
diff --git a/fs/xfs/xfs_dir2.c b/fs/xfs/xfs_dir2.c
index c21c527..3a8c6ba0 100644
--- a/fs/xfs/xfs_dir2.c
+++ b/fs/xfs/xfs_dir2.c
@@ -247,7 +247,7 @@
 int
 xfs_dir_cilookup_result(
 	struct xfs_da_args *args,
-	const char	*name,
+	const unsigned char *name,
 	int		len)
 {
 	if (args->cmpresult == XFS_CMP_DIFFERENT)