}
var duped = false;
for(var dupe in usage) {
- if (par != dupe && usage[par].join(',') == usage[dupe].join(',') && nusage[dupe]) {
+ if (par != dupe
+ && typeof(nusage[dupe]) != 'undefined'
+ && usage[par].join(',') == usage[dupe].join(',')) {
duped = true;
if (typeof(usage_left[dupe]) == 'undefined') {