Fixes instances were getQuality returns null instead of empty object

couchpotato/core/plugins/quality/static/quality.js

@@ -31,9 +31,9 @@ var QualityBase = new Class({
 
 	getQuality: function(identifier){
 		try {
-			return this.qualities.filter(function(q){
+			return (this.qualities.filter(function(q){
 				return q.identifier == identifier;
-			}).pick();
+			}).pick() || {});
 		}
 		catch(e){}