add: if (!card) return "";  
context: function GenerateAddressFromCard(card){  var email;  if (card.isMailList)     email = card.displayName;  else     email = card.primaryEmail;      return gHeaderParser.makeFullAddressWString(card.displayName, email);}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/be682523bff1e294176e827fb226082276d9d22d/abCommon.js/clean/mailnews/addrbook/resources/content/abCommon.js