Ryan Hicks - 2003-12-23

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I believe this error is due to the fact that 'MCScrolledListBox'
derives from 'Pmw.ScrolledFrame' which already creates a
'vertscrollbar'. Therefore, when 'createcomponent' in
PmwBase checks to make sure that the there isn't already a
component of the same name (line 461) an exception is raised.

I corrected this by changing all occurences of 'vertscrollbar' in
MCScrolledListBox (lines 132 and 198) to 'mcslbvertscrollbar'.