d3d11.idl: Trivial sync with Wine.

git-svn-id: svn+ssh://svn.code.sf.net/p/mingw-w64/code/trunk@6604 4407c894-4637-0410-b4f5-ada5f102cad1
diff --git a/mingw-w64-headers/direct-x/include/d3d11.idl b/mingw-w64-headers/direct-x/include/d3d11.idl
index 2e1d7ad..c5cb31a 100644
--- a/mingw-w64-headers/direct-x/include/d3d11.idl
+++ b/mingw-w64-headers/direct-x/include/d3d11.idl
@@ -1728,7 +1728,7 @@
         [out] ID3D11RenderTargetView **ppRenderTargetViews,
         [out] ID3D11DepthStencilView **ppDepthStencilView,
         [in] UINT UAVStartSlot,
-        [out] UINT NumUAVs,
+        [in] UINT NumUAVs,
         [out] ID3D11UnorderedAccessView **ppUnorderedAccessViews);
     void OMGetBlendState(
         [out] ID3D11BlendState **ppBlendState,