[gtk-doc] docs: mention syntax for referencing vmethods

[Stefan Kost <stefkost src gnome org>]

commit c8de897cc452e5361e5e0008341adf684a6f2948
Author: Stefan Sauer <ensonic users sf net>
Date:   Mon Nov 25 21:43:23 2013 +0100

    docs: mention syntax for referencing vmethods

 help/manual/C/index.docbook |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/help/manual/C/index.docbook b/help/manual/C/index.docbook
index 1b3222c..b826ef0 100644
--- a/help/manual/C/index.docbook
+++ b/help/manual/C/index.docbook
@@ -815,7 +815,8 @@ gtkdoc-fixxref --module=$(DOC_MODULE) --module-dir=html
           </listitem>
           <listitem>
             <para>
-              Use #Struct.field to refer to a field inside a structure.
+              Use #Struct.field to refer to a field inside a structure and
+              #GObjectClass.foo_bar() to refer to a vmethod.
             </para>
           </listitem>
         </itemizedlist>