rem: if (arrayOfPrefs) 
add: if (arrayOfPrefs) 
context: function LangAlreadyActive(langId){  var found = false;  try {    var arrayOfPrefs = pref_string.split(', ');    if (arrayOfPrefs)       for (var i = 0; i < arrayOfPrefs.length; i++) {      if (arrayOfPrefs[i] == langId) {         found = true;         break;      }    }    return found;  }  catch(ex){     return false;  }}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/0b2dd2b2d2fd037df917e07645fa019a963332a5/pref-languages.js/buggy/xpfe/components/prefwindow/resources/content/pref-languages.js