cache-tree.c: remove the_repository references

This case is more interesting than other boring "remove the_repo"
commits because while we need access to the object database, we cannot
simply use r->index because unpack-trees.c can operate on a temporary
index, not $GIT_DIR/index. Ideally we should be able to pass an object
database to lookup_tree() but that ship has sailed.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/sequencer.c b/sequencer.c
index 111cb74..726f727 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -2991,7 +2991,7 @@ static int do_reset(struct repository *r,
 	}
 
 	tree = parse_tree_indirect(&oid);
-	prime_cache_tree(r->index, tree);
+	prime_cache_tree(r, r->index, tree);
 
 	if (write_locked_index(r->index, &lock, COMMIT_LOCK) < 0)
 		ret = error(_("could not write index"));