[gnome-chess] configure.ac: Use maintainer mode by default

[Javier Jardón <jjardon src gnome org>]

commit 83363b90574a95d3a55a9f1a181983b5f89f2e42
Author: Javier Jardón <javier jardon codethink co uk>
Date:   Thu Feb 21 16:20:17 2013 +0000

    configure.ac: Use maintainer mode by default
    
    See
    https://mail.gnome.org/archives/desktop-devel-list/2011-September/msg00064.html

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index e889a33..8bfb0d8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,7 +1,7 @@
 AC_INIT(gnome-chess, 3.7.90)
 AM_INIT_AUTOMAKE([1.11 no-dist-gzip dist-xz foreign])
 AM_SILENT_RULES([yes])
-AM_MAINTAINER_MODE
+AM_MAINTAINER_MODE([enable])
 GNOME_MAINTAINER_MODE_DEFINES
 
 AM_PROG_VALAC([0.16.0])