[XFS] Remove unused argument to xfs_bmap_finish

The firstblock argument to xfs_bmap_finish is not used by that function.
Remove it and cleanup the code a bit.

Patch provided by Eric Sandeen.

SGI-PV: 960196
SGI-Modid: xfs-linux-melb:xfs-kern:28034a

Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
diff --git a/fs/xfs/xfs_rtalloc.c b/fs/xfs/xfs_rtalloc.c
index 880c732..dcf57dc 100644
--- a/fs/xfs/xfs_rtalloc.c
+++ b/fs/xfs/xfs_rtalloc.c
@@ -147,7 +147,7 @@
 		/*
 		 * Free any blocks freed up in the transaction, then commit.
 		 */
-		error = xfs_bmap_finish(&tp, &flist, firstblock, &committed);
+		error = xfs_bmap_finish(&tp, &flist, &committed);
 		if (error)
 			goto error_exit;
 		xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL);