Fix some policies

lib/metadata/policies.js

@@ -416,7 +416,7 @@ var policies = {
         "message": "<p>This is the number of different colors defined in CSS.</p><p>Your CSS project will be easier to maintain if you keep a small color set.</p>",
         "isOkThreshold": 30,
         "isBadThreshold": 150,
-        "isAbnormalThreshold": 300,
+        "isAbnormalThreshold": 400,
         "hasOffenders": true,
         "offendersTransformFn": function(offenders, ruleObject) {
             var deduplicatedObj = {};
@@ -771,7 +771,7 @@ var policies = {
                 list: offenders.map(function(offender) {
                     var splittedOffender = offendersHelpers.cssOffenderPattern(offender);
 
-                    var rule = splittedOffender.css;
+                    var rule = splittedOffender.css || '';
                     var redundanters = [
                         ['ul', 'li'],
                         ['ol', 'li'],