[gdm] configure: bump to 3.13.91

[Ray Strode <halfline src gnome org>]

commit c9377a4e355605b9190cdabbc3253f115536c9e7
Author: Ray Strode <rstrode redhat com>
Date:   Tue Sep 2 15:33:29 2014 -0400

    configure: bump to 3.13.91

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 646432e..aefecb9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,7 +1,7 @@
 
 AC_PREREQ([2.60])
 AC_INIT([gdm],
-        [3.12.2],
+        [3.13.91],
         [http://bugzilla.gnome.org/enter_bug.cgi?product=gdm])
 
 AC_CONFIG_SRCDIR([daemon/gdm-manager.c])