user32/listbox: Return 0 from LB_GETITEMDATA for LBS_NODATA listboxes.

dlls/user32/listbox.c

@@ -2684,7 +2684,7 @@ LRESULT ListBoxWndProc_common( HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam
             SetLastError(ERROR_INVALID_INDEX);
             return LB_ERR;
         }
-        return descr->items[wParam].data;
+        return (descr->style & LBS_NODATA) ? 0 : descr->items[wParam].data;
 
     case LB_SETITEMDATA:
         if (((INT)wParam < 0) || ((INT)wParam >= descr->nb_items))

dlls/user32/tests/listbox.c

@@ -2099,7 +2099,6 @@ static void test_LBS_NODATA(void)
         ok(!memcmp(&data, &zero_data, sizeof(data)), "Unexpected item data.\n");
 
         ret = SendMessageA(listbox, LB_GETITEMDATA, valid_idx[i], 0);
-    todo_wine
         ok(ret == 0, "Unexpected return value %d.\n", ret);
     }