commit-graph: Fix missing closedir in expire_commit_graphs

The function calls opendir() but missing the corresponding
closedir() before exit the function.
Add missing closedir() to fix it.

Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Reviewed-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/commit-graph.c b/commit-graph.c
index 2b52818731..0d44cd0fa4 100644
--- a/commit-graph.c
+++ b/commit-graph.c
@@ -2269,6 +2269,8 @@ static void expire_commit_graphs(struct write_commit_graph_context *ctx)
 	}
 
 out:
+	if(dir)
+		closedir(dir);
 	strbuf_release(&path);
 }