initialize pack file size output paramter of got_privsep_recv_fetch_progress()
diff --git a/lib/privsep.c b/lib/privsep.c
index d53de88..03fb686 100644
--- a/lib/privsep.c
+++ b/lib/privsep.c
@@ -637,6 +637,7 @@ got_privsep_recv_fetch_progress(int *done, struct got_object_id **id,
*id = NULL;
*refname = NULL;
*server_progress = NULL;
+ *packfile_size = 0;
err = got_privsep_recv_imsg(&imsg, ibuf, 0);
if (err)