Re: [xml] minor compile warnings

[Roumen Petrov <bugtrack roumenpetrov info>]

[SNIP]
> AM_ICONV is defined in iconv.m4. I can found it in gettext-0.10.38 
> (gnu site begin with gettext-0.10.40 from 15-Sep-2001).
> The macro use AC_DEFINE_UNQUOTED, AC_TRY_COMPILE, AC_TRY_LINK.
> I can found them in autoconf 2.50 but I'm not sure for 2.13.
>
> So that for AM_ICONV: AC_PREREQ(2.50) is sufficient.
Just found that configure scrip for openldap 2.1.x use 
AC_DEFINE_UNQUOTED, AC_TRY_COMPILE, AC_TRY_LINK and is with 
AC_PREREQ(2.13) so autoconf 2.13 is sufficient.

Roumen