CRM-13802 - Search Builder js - fix variable type comparison

templates/CRM/Contact/Form/Search/Builder.js

@@ -122,7 +122,7 @@
       }
     }
     $.each(CRM.searchBuilder.fieldOptions[field], function(key, option) {
-      var selected = ($.inArray(option.key, options) > -1) ? 'selected="selected"' : '';
+      var selected = ($.inArray(''+option.key, options) > -1) ? 'selected="selected"' : '';
       select.append('<option value="' + option.key + '"' + selected + '>' + option.value + '</option>');
     });
     select.change();