index-pack: fix compilation with NO_PTHREADS

diff --git a/reachable.c b/reachable.c
index 654a8c58d689daf43f2ba4c40e4fe54d31c7826a..6f6835bf27481299a0374bc1c7746bad750cdd12 100644 (file)
--- a/reachable.c
+++ b/reachable.c
@@ -229,6 +229,9 @@ void mark_reachable_objects(struct rev_info *revs, int mark_reflog,
        /* Add all external refs */
        for_each_ref(add_one_ref, revs);
 
+       /* detached HEAD is not included in the list above */
+       head_ref(add_one_ref, revs);
+
        /* Add all reflog info */
        if (mark_reflog)
                for_each_reflog(add_one_reflog, revs);