[XFCE 0000022]: mixer plugin fails to get volume

The following NEW bug has been ADDED.
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http://bugs.xfce.org/view_bug_page.php?f_id=22
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Reporter:                   papermoon
Handler:                    
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Project:                    XFCE
Bug ID:                     0000022
Category:                   plugins
Reproducibility:            always
Severity:                   trivial
Priority:                   low
Status:                     new
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Date Submitted:             2003-11-23 13:04 GMT
Last Modified:              2003-11-23 13:04 GMT
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Summary:                    mixer plugin fails to get volume
Description: 
If one adds 2 mixer plugins to the panel (makes no sense, I know) and
removes one of these plugins, the remaining plugin fails to get the
volume. This is the log:

** (xfce4-panel:1360): CRITICAL **: file vc_oss.c: line 206
(vc_get_volume): assertion `mixer_handle != -1' failed

Tested with newest cvs checkout and 4.01.
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