arith.c: Change conditional test for inclusion of arctangent().

arith.c: Change conditional test for inclusion of arctangent().

2006-09-28  Steven G. Kargl <kargl@gcc.gnu.org>

	* arith.c: Change conditional test for inclusion of arctangent().
	(gfc_check_real_range): Change conditional test for use of
	mpfr_subnormalize.
	* simplify.c (gfc_simplify_atan2): Fix conditional for use of
	mpfr_atan2() instead of arctangent().
	(gfc_simplify_exponent): Fix conditional for use of mpfr_get_exp().
 	(gfc_simplify_log): Fix conditional for use of mpfr_atan2() instead
	 of arctangent().
	(gfc_simplify_nearest): Fix conditional for use of mpfr_nextafter().

From-SVN: r117289