ole32: Fix the algorithm used in CompositeMonikerImpl_Hash to match native.

dlls/ole32/compositemoniker.c

@@ -622,7 +622,7 @@ CompositeMonikerImpl_Hash(IMoniker* iface,DWORD* pdwHash)
         res = IMoniker_Hash(tempMk, &tempHash);
         if(FAILED(res))
             break;
-        *pdwHash = (*pdwHash * 37) + tempHash;
+        *pdwHash = *pdwHash ^ tempHash;
         
         IMoniker_Release(tempMk);
     }

dlls/ole32/tests/moniker.c

@@ -657,11 +657,9 @@ static void test_generic_composite_moniker(void)
     hr = IMoniker_Hash(moniker, &hash);
     ok_ole_success(hr, IMoniker_Hash);
 
-    todo_wine {
     ok(hash == 0xd87,
         "Hash value != 0xd87, instead was 0x%08lx\n",
         hash);
-    }
 
     /* IsSystemMoniker test */