[pygtk] Require PyGObject 2.21.3 now that sinkfunc registration is gone

[John Stowers <jstowers src gnome org>]

commit 0bea1085f6d6cba77073872ad5599425069f0840
Author: John Stowers <john stowers gmail com>
Date:   Sat Aug 7 23:46:46 2010 +1200

    Require PyGObject 2.21.3 now that sinkfunc registration is gone

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 60c6aa4..8b93725 100644
--- a/configure.ac
+++ b/configure.ac
@@ -15,7 +15,7 @@ m4_define(gtk_required_version,        2.8.0)
 m4_define(libglade_required_version,   2.5.0)
 m4_define(gtkunixprint_required_version,  2.9.0)
 m4_define(pycairo_required_version,    1.0.2) dnl or 1.1.7
-m4_define(pygobject_required_version,  2.16.1)
+m4_define(pygobject_required_version,  2.21.3)
 
 AC_INIT(pygtk, pygtk_version,
         [http://bugzilla.gnome.org/enter_bug.cgi?product=pygtk])