xfce4-mixer panel plugin

[Johannes Zellner]

Hello

I just downloaded the Revision 16194 from svn.
Now i have a problem with the mixer-plugin:
If i start xfce4-mixer everything works fine, but the panel plugin don't 
show a volume nor i can change it. If i start the mixer-window from the 
panel the window is empty (no channels)
The error-message on xterm is: ** (xfce4-panel:1073): CRITICAL **: 
vc_get_volume: assertion `i != -1' failed

Bye
    Johannes