rem: if (val != ICAL.INVALID_VALUE) 
add: if (val != null && val != ICAL.INVALID_VALUE) 
context:     mapPropsFromICS: function(icalcomp, propmap) {        for (var i = 0; i < propmap.length; i++) {            var prop = propmap[i];            var val = icalcomp[prop.ics];            if (val != ICAL.INVALID_VALUE)                this[prop.cal] = val;        }    },
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/c384132735fca7e508def655dc686043010b66fc/calItemBase.js/clean/calendar/base/src/calItemBase.js