From b774539743c52ef605c6e2cbac19376c2757cb86 Mon Sep 17 00:00:00 2001
From: Markus Armbruster <armbru@redhat.com>
Date: Sat, 1 Mar 2014 08:40:39 +0100
Subject: [PATCH] qapi: Add missing null check to opts_start_struct()

Argument is null when visiting an unboxed struct.  I can't see such a
visit in the current code.  Fix it anyway.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
---
 qapi/opts-visitor.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/qapi/opts-visitor.c b/qapi/opts-visitor.c
index 96ed85899d..5d830a2b56 100644
--- a/qapi/opts-visitor.c
+++ b/qapi/opts-visitor.c
@@ -124,7 +124,9 @@ opts_start_struct(Visitor *v, void **obj, const char *kind,
     OptsVisitor *ov = DO_UPCAST(OptsVisitor, visitor, v);
     const QemuOpt *opt;
 
-    *obj = g_malloc0(size > 0 ? size : 1);
+    if (obj) {
+        *obj = g_malloc0(size > 0 ? size : 1);
+    }
     if (ov->depth++ > 0) {
         return;
     }