From 9be9e26b74e4a8cf5798f1937662ac5f2f2f1f58 Mon Sep 17 00:00:00 2001
From: Peter Krempa <pkrempa@redhat.com>
Date: Thu, 22 Mar 2018 13:10:40 +0100
Subject: [PATCH] util: buffer: Tolerate NULL 'buf' in virBufferStrcat

Most other buffer APIs tolerate the buffer being NULL.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
---
 src/util/virbuffer.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/util/virbuffer.c b/src/util/virbuffer.c
index 1a6bf122e0..3d6defb73a 100644
--- a/src/util/virbuffer.c
+++ b/src/util/virbuffer.c
@@ -883,6 +883,9 @@ virBufferStrcat(virBufferPtr buf, ...)
 {
     va_list ap;
 
+    if (!buf)
+        return;
+
     va_start(ap, buf);
     virBufferStrcatVArgs(buf, ap);
     va_end(ap);
-- 
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