rem: ENSURE_ARG(aName && aValue, "missing name or value for QueryParameter!"); 
add: ENSURE_ARG(aName && (aValue != null), "missing name or value for QueryParameter!"); 
context: function QueryParameter(aName, aValue) {  ENSURE_ARG(aName && aValue, "missing name or value for QueryParameter!");  ENSURE(!kInvalidWords.test(aValue),         "Illegal value while creating a QueryParameter",         Cr.NS_ERROR_NOT_IMPLEMENTED);  this.name = aName;  this.value = aValue;}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/f039c8bd347ca9ee720edd525c93f7efe9d43fd0/nsSearchService.js/buggy/browser/components/search/nsSearchService.js