[gnome-contacts] Make maintiner mode enabled by default

[Alexander Larsson <alexl src gnome org>]

commit 5aef543857d040cc7eb7af66f4f7bd27bc57c583
Author: Alexander Larsson <alexl redhat com>
Date:   Fri Sep 9 16:10:21 2011 +0200

    Make maintiner mode enabled by default
    
    See http://blogs.gnome.org/desrt/2011/09/08/am_maintainer_mode-is-not-cool/

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index a52fd38..b3b4c8e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -6,7 +6,7 @@ AC_CONFIG_MACRO_DIR([m4])
 AM_INIT_AUTOMAKE
 # Enable silent rules is available
 AM_SILENT_RULES([yes])
-AM_MAINTAINER_MODE
+AM_MAINTAINER_MODE([enable])
 AC_CONFIG_FILES([Makefile
 		vapi/Makefile
 		src/Makefile