bcachefs: Fix check_i_sectors()

bch2_count_inode_sectors() uses for_each_btree_key() internally, which
handles lock restarts - the lockrestart_do() in check_i_sectors() is
redundant, and buggy here since the count that
bch2_count_inode_sectors() returns was interpreted as an error by
lockrestart_do().
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>

fs/bcachefs/fsck.c

@@ -1122,8 +1122,7 @@ static int check_i_sectors(struct btree_trans *trans, struct inode_walker *w)
 		if (i->inode.bi_sectors == i->count)
 			continue;
 
-		count2 = lockrestart_do(trans,
-			bch2_count_inode_sectors(trans, w->cur_inum, i->snapshot));
+		count2 = bch2_count_inode_sectors(trans, w->cur_inum, i->snapshot);
 
 		if (i->count != count2) {
 			bch_err(c, "fsck counted i_sectors wrong: got %llu should be %llu",