[clutter] docs: Replace unknown <envvar> tag with <varname>

[Emmanuele Bassi <ebassi src gnome org>]

commit 53014bd781e98cf884373ce92fde529dd1e347f0
Author: Emmanuele Bassi <ebassi linux intel com>
Date:   Mon Apr 30 17:46:48 2012 +0100

    docs: Replace unknown <envvar> tag with <varname>

 doc/reference/clutter/running-clutter.xml |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/doc/reference/clutter/running-clutter.xml b/doc/reference/clutter/running-clutter.xml
index 2a1da9b..0469ead 100644
--- a/doc/reference/clutter/running-clutter.xml
+++ b/doc/reference/clutter/running-clutter.xml
@@ -80,7 +80,7 @@
           <term>CLUTTER_ENABLE_DIAGNOSTIC</term>
           <listitem>
             <para>When set to 1, enables diagnostic messages for run-time
-            deprecations, similarly to <envvar>G_ENABLE_DIAGNOSTIC</envvar> in
+            deprecations, similarly to <varname>G_ENABLE_DIAGNOSTIC</varname> in
             GLib.</para>
           </listitem>
         </varlistentry>