[pygtk] Apply libtool 2.2 compatibility patch

[Paul Pogonyshev <paulp src gnome org>]

commit 313b6c7133542096e4b229066fb654b067883212
Author: Paul Pogonyshev <pogonyshev gmx net>
Date:   Fri May 8 23:14:21 2009 +0300

    Apply libtool 2.2 compatibility patch
    
    Closes bug #564023.
---
 configure.ac |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/configure.ac b/configure.ac
index 91f0d06..be5ff1d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -72,6 +72,8 @@ m4_define([_LT_AC_TAGCONFIG],[])
 
 AC_LIBTOOL_WIN32_DLL
 AC_PROG_LIBTOOL
+dnl when using libtool 2.x create libtool early, because it's used in configure
+m4_ifdef([LT_OUTPUT], [LT_OUTPUT])
 
 AM_PATH_PYTHON(2.3.5)