add: if (index < 0) return -1;  
context: function bov_getpi (index){    return 0;}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/0ce31a79343e29e27a5102a1ca9099fd6e804946/tree-utils.js/clean/extensions/venkman/resources/content/tree-utils.js