ntdll: Fix incorrectly sized mov in user_mode_callback_return.
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).