[1/5] windowscodecs: Treat missing GUID list keys as empty.

[Vincent Povirk]

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From e9993ead9c995f22b24fb1702cbd54b4bf46108e Mon Sep 17 00:00:00 2001
From: Vincent Povirk <vincent at codeweavers.com>
Date: Thu, 6 Nov 2014 16:07:17 -0600
Subject: [PATCH 1/7] windowscodecs: Treat missing GUID list keys as empty.

---
 dlls/windowscodecs/info.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/dlls/windowscodecs/info.c b/dlls/windowscodecs/info.c
index 5f42994..d42d726 100644
--- a/dlls/windowscodecs/info.c
+++ b/dlls/windowscodecs/info.c
@@ -151,7 +151,12 @@ static HRESULT ComponentInfo_GetGuidList(HKEY classkey, LPCWSTR subkeyname,
         return E_INVALIDARG;
 
     ret = RegOpenKeyExW(classkey, subkeyname, 0, KEY_READ, &subkey);
-    if (ret != ERROR_SUCCESS) return HRESULT_FROM_WIN32(ret);
+    if (ret == ERROR_FILE_NOT_FOUND)
+    {
+        *actual_size = 0;
+        return S_OK;
+    }
+    else if (ret != ERROR_SUCCESS) return HRESULT_FROM_WIN32(ret);
 
     if (buffer)
     {
-- 
2.1.0