rem: this.point.destroy(); 
add: if(this.point) { this.point.destroy(); } 
context:     destroyFeature: function() {        this.point.destroy();        this.point = null;    },
meta: 1027	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/1027/7881c2099aa9f0e544d1d01411448d24c1b43694/Point.js/clean/lib/OpenLayers/Handler/Point.js