quartz: Implement a dummy null renderer for directshow.
diff --git a/dlls/quartz/quartz_private.h b/dlls/quartz/quartz_private.h
index ebb6a02..f730876 100644
--- a/dlls/quartz/quartz_private.h
+++ b/dlls/quartz/quartz_private.h
@@ -52,6 +52,7 @@
 HRESULT AVIDec_create(IUnknown * pUnkOuter, LPVOID * ppv);
 HRESULT DSoundRender_create(IUnknown * pUnkOuter, LPVOID * ppv);
 HRESULT VideoRenderer_create(IUnknown * pUnkOuter, LPVOID * ppv);
+HRESULT NullRenderer_create(IUnknown * pUnkOuter, LPVOID * ppv);
 HRESULT VideoRendererDefault_create(IUnknown * pUnkOuter, LPVOID * ppv);
 HRESULT QUARTZ_CreateSystemClock(IUnknown * pUnkOuter, LPVOID * ppv);
 HRESULT ACMWrapper_create(IUnknown * pUnkOuter, LPVOID * ppv);