[gtk+] Make cross-references to gio docs work

[Matthias Clasen <matthiasc src gnome org>]

commit 80a7e21e6a24481d5ccf8d60f86007919289d7cb
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue May 31 20:00:11 2011 -0400

    Make cross-references to gio docs work

 docs/reference/gtk/Makefile.am |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/docs/reference/gtk/Makefile.am b/docs/reference/gtk/Makefile.am
index 7c643b5..7c80efe 100644
--- a/docs/reference/gtk/Makefile.am
+++ b/docs/reference/gtk/Makefile.am
@@ -371,6 +371,7 @@ HTML_IMAGES = \
 FIXXREF_OPTIONS=--extra-dir=../gdk/html \
 	--extra-dir=$(GLIB_PREFIX)/share/gtk-doc/html/gobject \
 	--extra-dir=$(GLIB_PREFIX)/share/gtk-doc/html/glib \
+	--extra-dir=$(GLIB_PREFIX)/share/gtk-doc/html/gio \
 	--extra-dir=$(ATK_PREFIX)/share/gtk-doc/html/atk \
 	--extra-dir=$(PANGO_PREFIX)/share/gtk-doc/html/pango \
 	--extra-dir=$(CAIRO_PREFIX)/share/gtk-doc/html/cairo