gdb/

	* event-top.c (mark_async_signal_handler_wrapper): Remove.
	* event-top.h: Remove its declaration.
	(async_request_quit): Call mark_async_signal_handler instead of
	mark_async_signal_handler_wrapper.
	(async_do_nothing, async_disconnect): Likewise.
	(async_stop_sig): Likewise.
	* remote.c (handle_remote_sigint): Likewise.
	(handle_remote_sigint_twice): Likewise.