* tracepoint.h (set_traceframe_number)

	* tracepoint.h (set_traceframe_number)
	(cleanup_restore_current_traceframe): Declare.
	* tracepoint.c (set_traceframe_number): New.
	(struct current_traceframe_cleanup): New.
	(do_restore_current_traceframe_cleanup)
	(restore_current_traceframe_cleanup_dtor)
	(make_cleanup_restore_current_traceframe): New.
	* infrun.c: Include tracepoint.h.
	(fetch_inferior_event): Switch out and in of tfind mode.