rtlanal.c (insn_first_p): Fix return value for insn == reference.

rtlanal.c (insn_first_p): Fix return value for insn == reference.

	* rtlanal.c (insn_first_p): Fix return value for insn == reference.
	* loop.c (strength_reduce, check_final_value, check_dbra_loop):
	Use loop_insn_first_p.

From-SVN: r25321