cse.c (delete_trivially_dead_insns): Speed up by using NEXT_INSN and PREV_INSN directly instead of next_real_insn...

	* cse.c (delete_trivially_dead_insns): Speed up by using
	NEXT_INSN and PREV_INSN directly instead of next_real_insn and
	prev_real_insn.

From-SVN: r95488