[Plugin: Collapsing Categories] Javascript error

Hello, in latest version (2.0.1) I had to replace

echo "addExpandCollapse('widget-collapscat-$number-top'," .
          "'$expandSym', '$collapseSym', " . $accordion . ")";

with

if (!empty($accordion))
      echo "addExpandCollapse('widget-collapscat-$number-top'," .
          "'$expandSym', '$collapseSym', " . $accordion . ")";
else
      echo "addExpandCollapse('widget-collapscat-$number-top'," .
          "'$expandSym', '$collapseSym')";

in file collapscat.php
in order to avoid a javascript error because of the missing parameter

http://wordpress.org/extend/plugins/collapsing-categories/