[gnome-chess] configure.ac: just fix an embarassing typo

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 04d45a509dd75d8c17f330b7f831ec1d89eedbd2
Author: Michael Catanzaro <mike catanzaro gmail com>
Date:   Tue Jun 25 21:58:08 2013 -0500

    configure.ac: just fix an embarassing typo

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 4b1d0e0..29b6c6a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,4 +1,4 @@
-AC_PREQ([2.64])
+AC_PREREQ([2.64])
 AC_INIT([gnome-chess],[3.9.2])
 AM_INIT_AUTOMAKE([1.11 no-dist-gzip dist-xz foreign])
 AC_CONFIG_SRCDIR([src/gnome-chess.vala])