icon naming utils patch

[Jani Monoses]

> 
> The settings dialog is finally properly themable via icon themes (well
> some icons are still not handled by the icon naming mapping, or are not
> yet available in Tango):
> 
> http://foo-projects.org/~benny/tmp/xfce-mcs-dialog-tango.png

I get the same except the xfce4-mixer icon is the stock blue speaker one 
not the one from the theme, and I am using current svn. Any idea?

thanks
Jani