Fix guards for qecvt

	[BZ #15007]
	* stdlib/stdlib.h: Update guards for qecvt.
	* stdlib/bits/stdlib-ldbl.h: Sync guards for qecvt etc with
	<stdlib.h>.
Fix ia_FR postal format

2013-04-27  Nik Kalach  <nikka@fedoraproject.org>

	[BZ #15221]
	* locales/ia_FR: Fix postal_fmt definition.
Fix catan, catanh spurious overflows (bug 15409).