wined3d: The stateblock doesn't really need a parent.

dlls/wined3d/device.c

@@ -605,7 +605,7 @@ static HRESULT WINAPI IWineD3DDeviceImpl_CreateStateBlock(IWineD3DDevice *iface,
         return E_OUTOFMEMORY;
     }
 
-    hr = stateblock_init(object, This, type, parent);
+    hr = stateblock_init(object, This, type);
     if (FAILED(hr))
     {
         WARN("Failed to initialize stateblock, hr %#x.\n", hr);

dlls/wined3d/stateblock.c

@@ -535,13 +535,6 @@ static ULONG  WINAPI IWineD3DStateBlockImpl_Release(IWineD3DStateBlock *iface) {
 /**********************************************************
  * IWineD3DStateBlockImpl parts follows
  **********************************************************/
-static HRESULT  WINAPI IWineD3DStateBlockImpl_GetParent(IWineD3DStateBlock *iface, IUnknown **pParent) {
-    IWineD3DStateBlockImpl *This = (IWineD3DStateBlockImpl *)iface;
-    IUnknown_AddRef(This->parent);
-    *pParent = This->parent;
-    return WINED3D_OK;
-}
-
 static HRESULT  WINAPI IWineD3DStateBlockImpl_GetDevice(IWineD3DStateBlock *iface, IWineD3DDevice** ppDevice){
 
     IWineD3DStateBlockImpl *This   = (IWineD3DStateBlockImpl *)iface;
@@ -1328,22 +1321,19 @@ static const IWineD3DStateBlockVtbl IWineD3DStateBlock_Vtbl =
     IWineD3DStateBlockImpl_AddRef,
     IWineD3DStateBlockImpl_Release,
     /* IWineD3DStateBlock */
-    IWineD3DStateBlockImpl_GetParent,
     IWineD3DStateBlockImpl_GetDevice,
     IWineD3DStateBlockImpl_Capture,
     IWineD3DStateBlockImpl_Apply,
     IWineD3DStateBlockImpl_InitStartupStateBlock
 };
 
-HRESULT stateblock_init(IWineD3DStateBlockImpl *stateblock, IWineD3DDeviceImpl *device,
-        WINED3DSTATEBLOCKTYPE type, IUnknown *parent)
+HRESULT stateblock_init(IWineD3DStateBlockImpl *stateblock, IWineD3DDeviceImpl *device, WINED3DSTATEBLOCKTYPE type)
 {
     unsigned int i;
     HRESULT hr;
 
     stateblock->lpVtbl = &IWineD3DStateBlock_Vtbl;
     stateblock->ref = 1;
-    stateblock->parent = parent;
     stateblock->wineD3DDevice = device;
     stateblock->blockType = type;
 

dlls/wined3d/wined3d_private.h

@@ -2194,7 +2194,6 @@ struct IWineD3DStateBlockImpl
     LONG                      ref;     /* Note: Ref counting not required */
 
     /* IWineD3DStateBlock information */
-    IUnknown                 *parent;
     IWineD3DDeviceImpl       *wineD3DDevice;
     WINED3DSTATEBLOCKTYPE     blockType;
 
@@ -2293,8 +2292,8 @@ struct IWineD3DStateBlockImpl
     unsigned int              num_contained_sampler_states;
 };
 
-HRESULT stateblock_init(IWineD3DStateBlockImpl *stateblock, IWineD3DDeviceImpl *device,
-        WINED3DSTATEBLOCKTYPE type, IUnknown *parent) DECLSPEC_HIDDEN;
+HRESULT stateblock_init(IWineD3DStateBlockImpl *stateblock,
+        IWineD3DDeviceImpl *device, WINED3DSTATEBLOCKTYPE type) DECLSPEC_HIDDEN;
 void stateblock_init_contained_states(IWineD3DStateBlockImpl *object) DECLSPEC_HIDDEN;
 
 /* Direct3D terminology with little modifications. We do not have an issued state

include/wine/wined3d.idl

@@ -2724,7 +2724,7 @@ interface IWineD3DVertexDeclaration : IWineD3DBase
     local,
     uuid(83b073ce-6f30-11d9-c687-00046142c14f)
 ]
-interface IWineD3DStateBlock : IWineD3DBase
+interface IWineD3DStateBlock : IUnknown
 {
     HRESULT GetDevice(
         [out] IWineD3DDevice **device