Merge pull request #2477 from Shazwazza/U4-10992

U4-10992 (UDUF) TourController Object reference not set to an instance of an…

src/Umbraco.Web/Models/BackOfficeTour.cs

@@ -9,6 +9,11 @@ namespace Umbraco.Web.Models
     [DataContract(Name = "tour", Namespace = "")]
     public class BackOfficeTour
     {
+        public BackOfficeTour()
+        {
+            RequiredSections = new List<string>();
+        }
+
         [DataMember(Name = "name")]
         public string Name { get; set; }
         [DataMember(Name = "alias")]

src/Umbraco.Web/Models/BackOfficeTourFile.cs

@@ -9,6 +9,11 @@ namespace Umbraco.Web.Models
     [DataContract(Name = "tourFile", Namespace = "")]
     public class BackOfficeTourFile
     {
+        public BackOfficeTourFile()
+        {
+            Tours = new List<BackOfficeTour>();
+        }
+
         /// <summary>
         /// The file name for the tour
         /// </summary>
@@ -27,4 +32,4 @@ namespace Umbraco.Web.Models
         [DataMember(Name = "tours")]
         public IEnumerable<BackOfficeTour> Tours { get; set; }
     }
-}
+}