From f73fc95ea5e745118a3f05f62a5d73cba871cc42 Mon Sep 17 00:00:00 2001
From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Wed, 22 Aug 2018 21:50:50 +0900
Subject: [PATCH] strbuf: accept NULL for strbuf_cleanup()

---
 src/basic/strbuf.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/basic/strbuf.c b/src/basic/strbuf.c
index e2ed776a09..275a012b28 100644
--- a/src/basic/strbuf.c
+++ b/src/basic/strbuf.c
@@ -66,6 +66,9 @@ void strbuf_complete(struct strbuf *str) {
 
 /* clean up everything */
 void strbuf_cleanup(struct strbuf *str) {
+        if (!str)
+                return;
+
         strbuf_complete(str);
         free(str->buf);
         free(str);