* reorg.c (delete_scheduled_jump): Strengthen param "insn" from
rtx to rtx_insn *.
(steal_delay_list_from_target): Use methods of "seq".
(try_merge_delay_insns): Use methods of "merged_insns".
(update_block): Strengthen param "insn" from rtx to rtx_insn *.
(reorg_redirect_jump): Likewise for param "jump".