From a05b4c9bedfe99815eb887903e7687fe2d1bb3f9 Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Thu, 13 Aug 2020 17:25:52 +0200
Subject: Make zix_hash_free() tolerate NULL

---
 test/hash_test.c | 2 ++
 zix/hash.c       | 4 ++++
 2 files changed, 6 insertions(+)

diff --git a/test/hash_test.c b/test/hash_test.c
index 8b3e9de..ea808e6 100644
--- a/test/hash_test.c
+++ b/test/hash_test.c
@@ -202,6 +202,8 @@ stress(void)
 int
 main(void)
 {
+	zix_hash_free(NULL);
+
 	if (stress()) {
 		return 1;
 	}
diff --git a/zix/hash.c b/zix/hash.c
index e8acfea..c4a2dba 100644
--- a/zix/hash.c
+++ b/zix/hash.c
@@ -75,6 +75,10 @@ zix_hash_new(ZixHashFunc  hash_func,
 ZIX_API void
 zix_hash_free(ZixHash* hash)
 {
+	if (!hash) {
+		return;
+	}
+
 	for (unsigned b = 0; b < *hash->n_buckets; ++b) {
 		ZixHashEntry* bucket = hash->buckets[b];
 		for (ZixHashEntry* e = bucket; e;) {
-- 
cgit v1.2.1