[gtk+] docs: Add gtkx.h to the list of headers

[Benjamin Otte <otte src gnome org>]

commit 246269faaceac8ec2b8bf9dd1c24251023a15c53
Author: Benjamin Otte <otte redhat com>
Date:   Mon Apr 2 03:20:06 2012 +0200

    docs: Add gtkx.h to the list of headers

 docs/reference/gtk/migrating-2to3.xml |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/docs/reference/gtk/migrating-2to3.xml b/docs/reference/gtk/migrating-2to3.xml
index c6be31a..bb2aad5 100644
--- a/docs/reference/gtk/migrating-2to3.xml
+++ b/docs/reference/gtk/migrating-2to3.xml
@@ -42,6 +42,10 @@
         <listitem>for GTK</listitem>
       </varlistentry>
       <varlistentry>
+        <term><filename>gtk/gtkx.h</filename></term>
+        <listitem>for the X-specfic widgets #GtkSocket and #GtkPlug</listitem>
+      </varlistentry>
+      <varlistentry>
         <term><filename>gtk/gtkunixprint.h</filename></term>
         <listitem>for low-level, UNIX-specific printing functions</listitem>
       </varlistentry>