[PATCH 0/1] MR1308: ntdll: Fix incorrectly sized mov in user_mode_callback_return.

[Torge Matthies (＠tmatthies)]

This caused non-interactible windows in my Wine builds, where in win32u `dispatch_win_proc_params` got inlined into `call_window_proc` and this mov overwrote the lower 32 bits of `result`, causing WM_NCHITTEST messages to always return 0 or 0xffffffff00000000 (correct result was -1 in that case).