[gnome-chess] Add an AC_PREQ line to configure.ac

[Michael Catanzaro <mcatanzaro src gnome org>]

commit e70154a5c4fbdff3252478ae86d4c335d0b02490
Author: Michael Catanzaro <mike catanzaro gmail com>
Date:   Tue Jun 25 20:48:57 2013 -0500

    Add an AC_PREQ line to configure.ac

 configure.ac |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 8b8d0fe..0acb983 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,3 +1,4 @@
+AC_PREQ([2.64])
 AC_INIT([gnome-chess],[3.9.2])
 AM_INIT_AUTOMAKE([1.11 no-dist-gzip dist-xz foreign])
 AM_SILENT_RULES([yes])