fix bugs

Author: andrey-abramow

build/angular-cycle-gallery.js

@@ -407,6 +407,7 @@
         }
 
         ItemsStorage.prototype.setItems = function(items) {
+          if(!items){return;};
           this.count = items.length;
           this.items = items;
           this.cycler.setItems(this.items);

src/js/gallery/service/cycle_generator.coffee

@@ -13,6 +13,7 @@ angular.module('multiGallery').service 'CycleGenerator', ->
     _cycleItems: []
 
     setItems: (items)->
+      return unless items
       @_items = items
       @_count = items.length
       @_cycleItems = []