From: Marko Kreen <markokr@gmail.com>
Date: Wed, 30 Apr 2014 16:30:32 +0000 (+0300)
Subject: heap: heap_destroy() works on NULL argument
X-Git-Url: http://git.postgresql.org/gitweb/static/session/%7B%7Bsession.id%7D%7D-%7B%7Bsession.title%7Cslugify%7D%7D?a=commitdiff_plain;h=1497b4c40a873cfc5bbcd7f95dd92fb08f256db4;p=libusual.git

heap: heap_destroy() works on NULL argument
---

diff --git a/usual/heap.c b/usual/heap.c
index 4145f84..79ffcf6 100644
--- a/usual/heap.c
+++ b/usual/heap.c
@@ -126,8 +126,10 @@ struct Heap *heap_create(heap_is_better_f is_better_cb, heap_save_pos_f save_pos
 
 void heap_destroy(struct Heap *h)
 {
-	cx_free(h->cx, h->data);
-	cx_free(h->cx, h);
+	if (h) {
+		cx_free(h->cx, h->data);
+		cx_free(h->cx, h);
+	}
 }
 
 bool heap_reserve(struct Heap *h, unsigned extra)