[Plugin: Collapsing Categories] [resolved] syntax error

firebug is giving me a syntax error in firefox 12:

addExpandCollapse('widget-collapscat--top','', '', )// ]]> at the ) apparently. i’m not quite sure how to fix this, although it doesn’t affect functionality i’d like to get rid of it =)

thanks in advance!
kaspar

[resolved] it appears to be the same syntax error as described here. the same fix applies

http://ww.wp.xz.cn/extend/plugins/collapsing-categories/