xfs: fix radix tree tag signs

Radix tree tags are supposed to be unsigned ints, so fix the callers.
Signed-off-by: NDarrick J. Wong <djwong@kernel.org>
Reviewed-by: NDave Chinner <dchinner@redhat.com>

fs/xfs/libxfs/xfs_sb.c

@@ -61,7 +61,7 @@ struct xfs_perag *
 xfs_perag_get_tag(
 	struct xfs_mount	*mp,
 	xfs_agnumber_t		first,
-	int			tag)
+	unsigned int		tag)
 {
 	struct xfs_perag	*pag;
 	int			found;

fs/xfs/libxfs/xfs_sb.h

@@ -17,8 +17,8 @@ struct xfs_perag;
  * perag get/put wrappers for ref counting
  */
 extern struct xfs_perag *xfs_perag_get(struct xfs_mount *, xfs_agnumber_t);
-extern struct xfs_perag *xfs_perag_get_tag(struct xfs_mount *, xfs_agnumber_t,
-					   int tag);
+struct xfs_perag *xfs_perag_get_tag(struct xfs_mount *mp, xfs_agnumber_t agno,
+		unsigned int tag);
 extern void	xfs_perag_put(struct xfs_perag *pag);
 extern int	xfs_initialize_perag_data(struct xfs_mount *, xfs_agnumber_t);