net/freerdp: error: incompatible function pointer types assigning to 'OBJECT_NEW_FN' on 14+

clang 16+ (maybe 15 too) build error:
/usr/ports/net/freerdp/work/freerdp-2.11.1/client/Wayland/wlfreerdp.c:637:19: error: incompatible function pointer types assigning to 'OBJECT_NEW_FN' (aka 'void *(*)(void *)') from 'void *(const void *)' [-Wincompatible-function-pointer-types]

obj->fnObjectNew = uwac_event_clone;
                 ^ ~~~~~~~~~~~~~~~~

PR: 273731
Approved by: arrowd (mentor, implicit)
Obtained from: https://github.com/FreeRDP/FreeRDP/pull/9373