pw-mon: fix type confusion in core event handler
All pw_core event handlers (on_core_*()
) currently receive a pointer
to struct data
, not struct proxy_data
; as can be seen from the
pw_core_add_listener()
call in main()
.
Fixes: cacdcc1b ("pw-mon: add filter param to hide props and/or params")
Fixes #3997 (closed)