user32: Change value of WM_MDICALCCHILDSCROLL to 0x003f.

dlls/user32/mdi.c

@@ -103,7 +103,7 @@ WINE_DEFAULT_DEBUG_CHANNEL(mdi);
 
 #define MDI_MAXTITLELENGTH      0xa1
 
-#define WM_MDICALCCHILDSCROLL   0x10ac /* this is exactly what Windows uses */
+#define WM_MDICALCCHILDSCROLL   0x003f /* this is exactly what Windows uses */
 
 /* "More Windows..." definitions */
 #define MDI_MOREWINDOWSLIMIT    9       /* after this number of windows, a "More Windows..."

dlls/user32/tests/win.c

@@ -2194,11 +2194,9 @@ static void test_mdi(void)
                 gotit = TRUE;
             }
             else
-todo_wine
                 ok(msg.hwnd != mdi_client, "message %04x should not be posted to mdiclient\n", msg.message);
             DispatchMessageA(&msg);
         }
-todo_wine
         ok(gotit, "message 0x003f should appear after SetWindowPos\n");
 
         si.cbSize = sizeof(si);