[network-manager-pptp] Replace obsolete AC_HELP_STRING with AS_HELP_STRING

[Michael Biebl <mbiebl src gnome org>]

commit 589a47f68e186f6e546afd3d712e2c91f6abf2c6
Author: Michael Biebl <biebl debian org>
Date:   Tue Apr 21 00:50:48 2009 +0200

    Replace obsolete AC_HELP_STRING with AS_HELP_STRING
---
 configure.ac |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index 174372e..dc98d60 100644
--- a/configure.ac
+++ b/configure.ac
@@ -50,7 +50,7 @@ AC_CHECK_FUNCS(select socket uname)
 dnl
 dnl GNOME support
 dnl
-AC_ARG_WITH(gnome, AC_HELP_STRING([--without-gnome], [Build NetworkManager-pptp without GNOME support, e.g. vpn service only]))
+AC_ARG_WITH(gnome, AS_HELP_STRING([--without-gnome], [Build NetworkManager-pptp without GNOME support, e.g. vpn service only]))
 AM_CONDITIONAL(WITH_GNOME, test x"$with_gnome" != xno)
 
 GETTEXT_PACKAGE=NetworkManager-pptp
@@ -95,7 +95,7 @@ if test x"$with_gnome" != xno; then
 fi
 
 AC_ARG_ENABLE(more-warnings,
-AC_HELP_STRING([--enable-more-warnings], [Maximum compiler warnings]),
+AS_HELP_STRING([--enable-more-warnings], [Maximum compiler warnings]),
 set_more_warnings="$enableval",[
 if test -d "$srcdir/{arch}" || test -d "$srcdir/CVS"; then
 	set_more_warnings=yes