[gtk-doc] docs: fix the configure.ac suggestion for gtk-doc less setups

[Stefan Kost <stefkost src gnome org>]

commit c704150ee7ea7f83bc601449673c6f4273829594
Author: Stefan Kost <ensonic users sf net>
Date:   Thu Nov 4 22:53:01 2010 +0200

    docs: fix the configure.ac suggestion for gtk-doc less setups
    
    We need to define the automake conditional regardless to avoid automake failure
    during autogen phase.

 help/manual/C/gtk-doc-manual.xml |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/help/manual/C/gtk-doc-manual.xml b/help/manual/C/gtk-doc-manual.xml
index 58c3122..a99e590 100644
--- a/help/manual/C/gtk-doc-manual.xml
+++ b/help/manual/C/gtk-doc-manual.xml
@@ -428,6 +428,8 @@ GTK_DOC_CHECK([1.14],[--flavour no-tmpl])
 # check for gtk-doc
 m4_ifdef([GTK_DOC_CHECK], [
 GTK_DOC_CHECK([1.14],[--flavour no-tmpl])
+],[
+AM_CONDITIONAL([ENABLE_GTK_DOC], false)
 ])
 ]]>
           </programlisting>