[PATCH] builtin/index-pack.c: fix some sparse warnings

[Ramsay Jones <ramsay@ramsayjones.plus.com>]

Signed-off-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
---

Hi Jonathan,

If you need to re-roll your 'jt/threaded-index-pack' branch, could you
please squash this into the relevant patch (commit 4a03e3d995 (index-pack:
make quantum of work smaller, 24-08-2020)).

Thanks!

ATB,
Ramsay Jones

 builtin/index-pack.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/builtin/index-pack.c b/builtin/index-pack.c
index 3a20017102..8acd078aa0 100644
--- a/builtin/index-pack.c
+++ b/builtin/index-pack.c
@@ -65,7 +65,7 @@ struct base_data {
  *
  * Guarded by work_mutex.
  */
-LIST_HEAD(work_head);
+static LIST_HEAD(work_head);
 
 /*
  * Stack of struct base_data that have children, all of whom have been
@@ -75,7 +75,7 @@ LIST_HEAD(work_head);
  *
  * Guarded by work_mutex.
  */
-LIST_HEAD(done_head);
+static LIST_HEAD(done_head);
 
 /*
  * All threads share one delta base cache.
@@ -83,8 +83,8 @@ LIST_HEAD(done_head);
  * base_cache_used is guarded by work_mutex, and base_cache_limit is read-only
  * in a thread.
  */
-size_t base_cache_used;
-size_t base_cache_limit;
+static size_t base_cache_used;
+static size_t base_cache_limit;
 
 struct thread_local {
 	pthread_t thread;
-- 
2.28.0