rem: if (--this.frozen == 0) 
add: if (--this.frozen == 0 && "changeStart" in this) 
context: function tov_thaw (){    if (this.frozen == 0)    {        ASSERT (0, "not frozen");        return;    }        if (--this.frozen == 0)    {        this.childData.onVisualFootprintChanged(this.changeStart,                                                this.changeAmount);    }    if ("needsResort" in this) {        this.childData.resort();        delete this.needsResort;    }        delete this.changeStart;    delete this.changeAmount;    }
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/7544d3415d65bb702cb3060dd8ac2a22f009997b/tree-utils.js/clean/extensions/venkman/resources/content/tree-utils.js