clipboard: fix notice in clipboard_windows.c.v (#20733)

Author: max00217

vlib/clipboard/clipboard_windows.c.v

@@ -93,8 +93,8 @@ fn new_clipboard() &Clipboard {
 		cb_size: sizeof(WndClassEx)
 		lpfn_wnd_proc: voidptr(&C.DefWindowProc)
 		lpsz_class_name: class_name.to_wide()
-		lpsz_menu_name: 0
-		h_icon_sm: 0
+		lpsz_menu_name: unsafe { 0 }
+		h_icon_sm: unsafe { 0 }
 	}
 	if C.RegisterClassEx(voidptr(&wndclass)) == 0
 		&& C.GetLastError() != u32(C.ERROR_CLASS_ALREADY_EXISTS) {