ole32: Remove useless casts to self.

dlls/ole32/datacache.c

@@ -1003,7 +1003,7 @@ static HRESULT save_mfpict(DataCacheEntry *entry, BOOL contents, IStream *stream
         meta_place_rec.bounding_box[3] = (LONGLONG)mfpict->yExt * meta_place_rec.inch / 2540;
         GlobalUnlock(entry->stgmedium.u.hMetaFilePict);
 
-        for (check = (WORD *)&meta_place_rec; check != (WORD *)&meta_place_rec.checksum; check++)
+        for (check = (WORD *)&meta_place_rec; check != &meta_place_rec.checksum; check++)
             meta_place_rec.checksum ^= *check;
         hr = IStream_Write(stream, &meta_place_rec, sizeof(struct meta_placeable), NULL);
         if (hr == S_OK && data_size)

dlls/ole32/tests/compobj.c

@@ -1031,7 +1031,7 @@ static HRESULT WINAPI PSFactoryBuffer_CreateStub(
 {
     CHECK_EXPECT(CreateStub);
 
-    ok(pUnkServer == (IUnknown*)&Test_Unknown, "unexpected pUnkServer %p\n", pUnkServer);
+    ok(pUnkServer == &Test_Unknown, "unexpected pUnkServer %p\n", pUnkServer);
     if(!ps_factory_buffer)
         return E_NOTIMPL;
 
@@ -3753,10 +3753,10 @@ static DWORD CALLBACK implicit_mta_proc(void *param)
     hr = CoRegisterMessageFilter(NULL, NULL);
     ok(hr == CO_E_NOT_SUPPORTED, "got %#x\n", hr);
 
-    hr = CoLockObjectExternal((IUnknown *)&Test_Unknown, TRUE, TRUE);
+    hr = CoLockObjectExternal(&Test_Unknown, TRUE, TRUE);
     ok_ole_success(hr, "CoLockObjectExternal");
 
-    hr = CoDisconnectObject((IUnknown *)&Test_Unknown, 0);
+    hr = CoDisconnectObject(&Test_Unknown, 0);
     ok_ole_success(hr, "CoDisconnectObject");
 
     return 0;

dlls/ole32/tests/marshal.c

@@ -329,7 +329,7 @@ static HRESULT WINAPI Test_IClassFactory_CreateInstance(
     LPVOID *ppvObj)
 {
     if (pUnkOuter) return CLASS_E_NOAGGREGATION;
-    return IUnknown_QueryInterface((IUnknown*)&Test_Unknown, riid, ppvObj);
+    return IUnknown_QueryInterface(&Test_Unknown, riid, ppvObj);
 }
 
 static HRESULT WINAPI Test_IClassFactory_LockServer(