From 6f6e12a32961120185424c31e32b2dc62a165b5f Mon Sep 17 00:00:00 2001
From: Philip Rebohle <philip.rebohle@tu-dortmund.de>
Date: Wed, 21 Mar 2018 15:09:08 +0100
Subject: [PATCH] [util] Fix possible crash with null interfaces in private
 storage

---
 src/util/com/com_private_data.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/util/com/com_private_data.cpp b/src/util/com/com_private_data.cpp
index b06ade02c..e4d34db3c 100644
--- a/src/util/com/com_private_data.cpp
+++ b/src/util/com/com_private_data.cpp
@@ -23,7 +23,8 @@ namespace dxvk {
     const IUnknown* iface)
   : m_guid  (guid),
     m_iface (const_cast<IUnknown*>(iface)) {
-    m_iface->AddRef();
+    if (m_iface != nullptr)
+      m_iface->AddRef();
   }