[gtkmm-documentation] Correct link for tooltips example

[David King <davidk src gnome org>]

commit d6e254b04603eaf6b3b005ff37a15a58e88020fa
Author: David King <davidk openismus com>
Date:   Tue Feb 22 11:45:26 2011 +0100

    Correct link for tooltips example

 docs/tutorial/C/gtkmm-tutorial-in.xml |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/docs/tutorial/C/gtkmm-tutorial-in.xml b/docs/tutorial/C/gtkmm-tutorial-in.xml
index 100c88b..e1a1b41 100644
--- a/docs/tutorial/C/gtkmm-tutorial-in.xml
+++ b/docs/tutorial/C/gtkmm-tutorial-in.xml
@@ -1555,7 +1555,7 @@ such as showing an image as well as text.
   </screenshot>
 </figure>
 
-<para><ulink url="&url_examples_base;tooltip">Source Code</ulink></para>
+<para><ulink url="&url_examples_base;tooltips">Source Code</ulink></para>
 
 </sect2>