[ekiga] Fix gdu (gnome-doc-utils) configure option

[Eugen Dedu <ededu src gnome org>]

commit c81cabbee7901b6643907d08f9a530308044ec22
Author: Eugen Dedu <Eugen Dedu pu-pm univ-fcomte fr>
Date:   Mon Mar 1 21:08:00 2010 +0100

    Fix gdu (gnome-doc-utils) configure option
    
    Fixes bug #598070.

 configure.ac |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 4b99314..94f944d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -731,6 +731,7 @@ fi],enable_gdu=yes)
       AC_MSG_ERROR([Could not find scrollkeeper-config. Please install the scrollkeeper package: http://scrollkeeper.sourceforge.net])
     fi
     GDU="enabled"
+    AC_DEFINE(HAVE_GNOME_DOC_UTILS,1,[GNOME-Doc-Utils support])
   fi
 fi