[grilo-plugins] doc: Fix reference to docbookx.dtd

[Juan A. Suarez Romero <jasuarez src gnome org>]

commit 042e9f2a311c9d4fc1b92a6c95b94f323714d46e
Author: Juan A. Suarez Romero <jasuarez igalia com>
Date:   Tue Dec 11 13:44:24 2012 +0100

    doc: Fix reference to docbookx.dtd
    
    Either the URL was wrong or changed.

 help/C/grilo-plugins.xml |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/help/C/grilo-plugins.xml b/help/C/grilo-plugins.xml
index 9507a8b..dd64c35 100644
--- a/help/C/grilo-plugins.xml
+++ b/help/C/grilo-plugins.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
-  "http://docbook.org/docbook/xml/4.5/docbookx.dtd"; [
+  "http://docbook.org/xml/4.5/docbookx.dtd"; [
   <!ENTITY legal SYSTEM "legal.xml">
   <!ENTITY url_refdocs_base "http://developer.gnome.org/grilo/unstable/";>
   <!ENTITY url_examples_base "http://git.gnome.org/browse/grilo-plugins/tree/help/examples/";>