[PATCH -next] xfs: Fix -Wunused-variable warning

[YueHaibing]

If DEBUG is n, gcc warns:

fs/xfs/libxfs/xfs_ialloc.c:2032:20: warning: unused variable ‘agi’ [-Wunused-variable]

Move it info #ifdef block to fix this.

Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx>
---
 fs/xfs/libxfs/xfs_ialloc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/xfs/libxfs/xfs_ialloc.c b/fs/xfs/libxfs/xfs_ialloc.c
index 2ed6de6faf8a..a9973edd3c0a 100644
--- a/fs/xfs/libxfs/xfs_ialloc.c
+++ b/fs/xfs/libxfs/xfs_ialloc.c
@@ -2029,7 +2029,9 @@ xfs_difree_finobt(
 	xfs_agino_t			agino,
 	struct xfs_inobt_rec_incore	*ibtrec) /* inobt record */
 {
+#ifdef DEBUG
 	struct xfs_agi			*agi = agbp->b_addr;
+#endif
 	struct xfs_btree_cur		*cur;
 	struct xfs_inobt_rec_incore	rec;
 	int				offset = agino - ibtrec->ir_startino;
-- 
2.17.1