* trad-frame.c (struct trad_frame_cache): Rename next_frame to this_frame.

	* trad-frame.c (struct trad_frame_cache): Rename next_frame to this_frame.
	(trad_frame_cache_zalloc, trad_frame_alloc_saved_regs): Expect
	this_frame.
	(trad_frame_get_prev_register, trad_frame_get_register): Update signature.
	* trad-frame.h (trad_frame_cache_zalloc, trad_frame_get_register)
	(trad_frame_alloc_saved_regs, trad_frame_get_prev_register): Update
	signature.
	* tramp-frame.c (tramp_frame_cache, tramp_frame_start): Expect
	this_frame.
	(tramp_frame_this_id, tramp_frame_prev_register, tramp_frame_sniffer):
	Update signature.
	* tramp-frame.h (struct tramp_frame): Update signature of init.
	* Makefile.in (trad-frame.o): Update.