[PATCH] dwmapi: return DWM_E_COMPOSITIONDISABLED instead of E_NOTIMPL in DwmGetTransportAttributes

[Louis Lenders]

Fixes crash in Valil.Chess.WinFX
See https://www.winehq.org/pipermail/wine-bugs/2018-December/504413.html

On my windows 7 laptop it returns DWM_E_COMPOSITIONDISABLED if I disble
the DWM service via services.msc. 

I` ll send a test hereafter but unsure how useful it is, because the
testbots (wvista and win7) don`t return DWM_E_COMPOSITIONDISABLED;

Signed-off-by: Louis Lenders <xerox.xerox2000x(a)gmail.com>
---
 dlls/dwmapi/dwmapi_main.c | 2 +-
 include/winerror.h        | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/dlls/dwmapi/dwmapi_main.c b/dlls/dwmapi/dwmapi_main.c
index c1ee067122..eb06d15507 100644
--- a/dlls/dwmapi/dwmapi_main.c
+++ b/dlls/dwmapi/dwmapi_main.c
@@ -146,7 +146,7 @@ HRESULT WINAPI DwmGetTransportAttributes(BOOL *pfIsRemoting, BOOL *pfIsConnected
 {
     FIXME("(%p, %p, %p) stub\n", pfIsRemoting, pfIsConnected, pDwGeneration);
 
-    return E_NOTIMPL;
+    return DWM_E_COMPOSITIONDISABLED;
 }
 
 /**********************************************************************
diff --git a/include/winerror.h b/include/winerror.h
index d78c91e84e..a97b405c34 100644
--- a/include/winerror.h
+++ b/include/winerror.h
@@ -3090,6 +3090,8 @@ static inline HRESULT HRESULT_FROM_WIN32(unsigned int x)
 #define WININET_E_LOGIN_FAILURE_DISPLAY_ENTITY_BODY        _HRESULT_TYPEDEF_(0x80072f8e)
 #define WININET_E_DECODING_FAILED                          _HRESULT_TYPEDEF_(0x80072f8f)
 
+#define DWM_E_COMPOSITIONDISABLED                          _HRESULT_TYPEDEF_(0x80263001)
+
 #define D3D11_ERROR_TOO_MANY_UNIQUE_STATE_OBJECTS          _HRESULT_TYPEDEF_(0x887c0001)
 #define D3D11_ERROR_FILE_NOT_FOUND                         _HRESULT_TYPEDEF_(0x887c0002)
 #define D3D11_ERROR_TOO_MANY_UNIQUE_VIEW_OBJECTS           _HRESULT_TYPEDEF_(0x887c0003)
-- 
2.17.1