dsound: Implement QueryInterface for KsPropertySet objects.

[Robert Shearman]

---
  dlls/dsound/propset.c |    9 ++++++++-
  1 files changed, 8 insertions(+), 1 deletions(-)
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diff --git a/dlls/dsound/propset.c b/dlls/dsound/propset.c
index 66a4af6..b83ae37 100644
--- a/dlls/dsound/propset.c
+++ b/dlls/dsound/propset.c
@@ -19,6 +19,7 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  */
 
+#define COBJMACROS
 #include <stdarg.h>
 
 #include "windef.h"
@@ -241,8 +242,14 @@ static HRESULT WINAPI IKsPrivatePropertySetImpl_QueryInterface(
     IKsPrivatePropertySetImpl *This = (IKsPrivatePropertySetImpl *)iface;
     TRACE("(%p,%s,%p)\n",This,debugstr_guid(riid),ppobj);
 
+    if (IsEqualIID(riid, &IID_IUnknown) ||
+        IsEqualIID(riid, &IID_IKsPropertySet)) {
+        *ppobj = iface;
+        IUnknown_AddRef(iface);
+        return S_OK;
+    }
     *ppobj = NULL;
-    return DSERR_INVALIDPARAM;
+    return E_NOINTERFACE;
 }
 
 static ULONG WINAPI IKsPrivatePropertySetImpl_AddRef(LPKSPROPERTYSET iface)